diff --git a/it0-web-admin/package-lock.json b/it0-web-admin/package-lock.json
index 808c5fc..82426f1 100644
--- a/it0-web-admin/package-lock.json
+++ b/it0-web-admin/package-lock.json
@@ -25,11 +25,14 @@
         "class-variance-authority": "^0.7.0",
         "clsx": "^2.1.0",
         "date-fns": "^3.6.0",
+        "i18next": "^25.8.13",
+        "i18next-browser-languagedetector": "^8.2.1",
         "lucide-react": "^0.378.0",
         "next": "^14.2.0",
         "react": "^18.3.0",
         "react-dom": "^18.3.0",
         "react-hook-form": "^7.51.0",
+        "react-i18next": "^16.5.4",
         "react-redux": "^9.1.0",
         "recharts": "^2.12.0",
         "sonner": "^1.4.0",
@@ -4774,6 +4777,7 @@
       "integrity": "sha512-whOE1HFo/qJDyX4SnXzP4N6zOWn79WhnCUY/iDR0mPfQZO8wcYE4JClzI2oZrhBnnMUCBCHZhO6VQyoBU95mZA==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@rtsao/scc": "^1.1.0",
         "array-includes": "^3.1.9",
@@ -5661,6 +5665,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/html-parse-stringify": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/html-parse-stringify/-/html-parse-stringify-3.0.1.tgz",
+      "integrity": "sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg==",
+      "license": "MIT",
+      "dependencies": {
+        "void-elements": "3.1.0"
+      }
+    },
     "node_modules/human-signals": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/human-signals/-/human-signals-5.0.0.tgz",
@@ -5671,6 +5684,47 @@
         "node": ">=16.17.0"
       }
     },
+    "node_modules/i18next": {
+      "version": "25.8.13",
+      "resolved": "https://registry.npmjs.org/i18next/-/i18next-25.8.13.tgz",
+      "integrity": "sha512-E0vzjBY1yM+nsFrtgkjLhST2NBkirkvOVoQa0MSldhsuZ3jUge7ZNpuwG0Cfc74zwo5ZwRzg3uOgT+McBn32iA==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://locize.com"
+        },
+        {
+          "type": "individual",
+          "url": "https://locize.com/i18next.html"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+        }
+      ],
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@babel/runtime": "^7.28.4"
+      },
+      "peerDependencies": {
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/i18next-browser-languagedetector": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/i18next-browser-languagedetector/-/i18next-browser-languagedetector-8.2.1.tgz",
+      "integrity": "sha512-bZg8+4bdmaOiApD7N7BPT9W8MLZG+nPTOFlLiJiT8uzKXFjhxw4v2ierCXOwB5sFDMtuA5G4kgYZ0AznZxQ/cw==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.23.2"
+      }
+    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -7485,6 +7539,33 @@
         "react": "^16.8.0 || ^17 || ^18 || ^19"
       }
     },
+    "node_modules/react-i18next": {
+      "version": "16.5.4",
+      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-16.5.4.tgz",
+      "integrity": "sha512-6yj+dcfMncEC21QPhOTsW8mOSO+pzFmT6uvU7XXdvM/Cp38zJkmTeMeKmTrmCMD5ToT79FmiE/mRWiYWcJYW4g==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.28.4",
+        "html-parse-stringify": "^3.0.1",
+        "use-sync-external-store": "^1.6.0"
+      },
+      "peerDependencies": {
+        "i18next": ">= 25.6.2",
+        "react": ">= 16.8.0",
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        },
+        "react-native": {
+          "optional": true
+        },
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-is": {
       "version": "17.0.2",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
@@ -8869,7 +8950,7 @@
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
       "peer": true,
       "bin": {
@@ -9218,6 +9299,15 @@
         }
       }
     },
+    "node_modules/void-elements": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
+      "integrity": "sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
diff --git a/it0-web-admin/package.json b/it0-web-admin/package.json
index f89099b..982a208 100644
--- a/it0-web-admin/package.json
+++ b/it0-web-admin/package.json
@@ -11,52 +11,50 @@
     "test:e2e": "playwright test"
   },
   "dependencies": {
-    "next": "^14.2.0",
-    "react": "^18.3.0",
-    "react-dom": "^18.3.0",
-
-    "@reduxjs/toolkit": "^2.2.0",
-    "react-redux": "^9.1.0",
-    "zustand": "^4.5.0",
-    "@tanstack/react-query": "^5.45.0",
-    "@tanstack/react-table": "^8.17.0",
-
-    "tailwindcss": "^3.4.0",
-    "class-variance-authority": "^0.7.0",
-    "clsx": "^2.1.0",
-    "tailwind-merge": "^2.3.0",
+    "@hookform/resolvers": "^3.3.0",
+    "@monaco-editor/react": "^4.6.0",
     "@radix-ui/react-dialog": "^1.0.0",
     "@radix-ui/react-dropdown-menu": "^2.0.0",
     "@radix-ui/react-select": "^2.0.0",
     "@radix-ui/react-tabs": "^1.0.0",
     "@radix-ui/react-toast": "^1.1.0",
     "@radix-ui/react-tooltip": "^1.0.0",
-    "lucide-react": "^0.378.0",
-
-    "react-hook-form": "^7.51.0",
-    "zod": "^3.23.0",
-    "@hookform/resolvers": "^3.3.0",
-
-    "@monaco-editor/react": "^4.6.0",
-    "@xterm/xterm": "^5.5.0",
+    "@reduxjs/toolkit": "^2.2.0",
+    "@tanstack/react-query": "^5.45.0",
+    "@tanstack/react-table": "^8.17.0",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/addon-web-links": "^0.11.0",
-
-    "recharts": "^2.12.0",
+    "@xterm/xterm": "^5.5.0",
+    "class-variance-authority": "^0.7.0",
+    "clsx": "^2.1.0",
     "date-fns": "^3.6.0",
-    "sonner": "^1.4.0"
+    "i18next": "^25.8.13",
+    "i18next-browser-languagedetector": "^8.2.1",
+    "lucide-react": "^0.378.0",
+    "next": "^14.2.0",
+    "react": "^18.3.0",
+    "react-dom": "^18.3.0",
+    "react-hook-form": "^7.51.0",
+    "react-i18next": "^16.5.4",
+    "react-redux": "^9.1.0",
+    "recharts": "^2.12.0",
+    "sonner": "^1.4.0",
+    "tailwind-merge": "^2.3.0",
+    "tailwindcss": "^3.4.0",
+    "zod": "^3.23.0",
+    "zustand": "^4.5.0"
   },
   "devDependencies": {
+    "@testing-library/react": "^15.0.0",
     "@types/node": "^20.0.0",
     "@types/react": "^18.3.0",
     "@types/react-dom": "^18.3.0",
-    "typescript": "^5.4.0",
+    "autoprefixer": "^10.4.0",
     "eslint": "^8.57.0",
     "eslint-config-next": "^14.2.0",
+    "postcss": "^8.4.0",
     "prettier": "^3.2.0",
-    "vitest": "^1.6.0",
-    "@testing-library/react": "^15.0.0",
-    "autoprefixer": "^10.4.0",
-    "postcss": "^8.4.0"
+    "typescript": "^5.4.0",
+    "vitest": "^1.6.0"
   }
 }
diff --git a/it0-web-admin/src/app/(admin)/agent-config/hooks/page.tsx b/it0-web-admin/src/app/(admin)/agent-config/hooks/page.tsx
index fae8122..93c8193 100644
--- a/it0-web-admin/src/app/(admin)/agent-config/hooks/page.tsx
+++ b/it0-web-admin/src/app/(admin)/agent-config/hooks/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -106,6 +107,9 @@ function HookDialog({
   onChange: (field: keyof HookFormData, value: string | number | boolean) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
@@ -121,7 +125,7 @@ function HookDialog({
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('hooks.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -140,7 +144,7 @@ function HookDialog({
 
           {/* event type */}
           <div>
-            <label className="block text-sm font-medium mb-1">Event Type</label>
+            <label className="block text-sm font-medium mb-1">{t('hooks.form.eventType')}</label>
             <select
               value={form.event}
               onChange={(e) => onChange('event', e.target.value)}
@@ -156,7 +160,7 @@ function HookDialog({
 
           {/* tool pattern */}
           <div>
-            <label className="block text-sm font-medium mb-1">Tool Pattern</label>
+            <label className="block text-sm font-medium mb-1">{t('hooks.form.toolPattern')}</label>
             <input
               type="text"
               value={form.toolPattern}
@@ -172,7 +176,7 @@ function HookDialog({
           {/* script content */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Script <span className="text-destructive">*</span>
+              {t('hooks.form.script')} <span className="text-destructive">*</span>
             </label>
             <textarea
               value={form.script}
@@ -191,7 +195,7 @@ function HookDialog({
 
           {/* timeout */}
           <div>
-            <label className="block text-sm font-medium mb-1">Timeout (seconds)</label>
+            <label className="block text-sm font-medium mb-1">{t('hooks.form.timeout')}</label>
             <input
               type="number"
               value={form.timeout}
@@ -204,7 +208,7 @@ function HookDialog({
 
           {/* enabled toggle */}
           <div className="flex items-center gap-3">
-            <label className="text-sm font-medium">Enabled</label>
+            <label className="text-sm font-medium">{t('hooks.form.enabled')}</label>
             <button
               type="button"
               role="switch"
@@ -226,7 +230,7 @@ function HookDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('hooks.form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -245,7 +249,7 @@ function HookDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -253,7 +257,7 @@ function HookDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -278,15 +282,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Hook</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('hooks.deleteHook')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{hookName}</strong>? This action cannot be undone.
+          {tc('confirmDelete')} <strong>{hookName}</strong>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -294,14 +301,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -314,6 +321,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function HooksPage() {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -447,38 +456,37 @@ export default function HooksPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Hook Scripts</h1>
+          <h1 className="text-2xl font-bold">{t('hooks.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Lifecycle scripts for agent tool execution
+            {t('hooks.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Hook
+          {t('hooks.addHook')}
         </button>
       </div>
 
       {/* Info banner */}
       <div className="bg-blue-50 dark:bg-blue-900/20 border border-blue-200 dark:border-blue-800 rounded-lg p-4 mb-6">
         <p className="text-sm text-blue-800 dark:text-blue-200">
-          Hook scripts run at specific lifecycle points during agent execution. PreToolUse hooks
-          can block operations, PostToolUse hooks capture results for auditing.
+          {t('hooks.infoBanner')}
         </p>
       </div>
 
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load hooks: {(error as Error).message}
+          {t('hooks.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading hooks...
+          {t('hooks.loading')}
         </div>
       )}
 
@@ -489,12 +497,12 @@ export default function HooksPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Name</th>
-                  <th className="text-left px-4 py-3 font-medium">Event</th>
-                  <th className="text-left px-4 py-3 font-medium">Tool Pattern</th>
-                  <th className="text-left px-4 py-3 font-medium">Script</th>
-                  <th className="text-left px-4 py-3 font-medium">Enabled</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('hooks.table.name')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('hooks.table.event')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('hooks.table.toolPattern')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('hooks.table.script')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('hooks.table.enabled')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('hooks.table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -504,7 +512,7 @@ export default function HooksPage() {
                       colSpan={6}
                       className="text-center text-muted-foreground py-12"
                     >
-                      No hooks configured. Click &quot;Add Hook&quot; to create one.
+                      {t('hooks.empty')}
                     </td>
                   </tr>
                 ) : (
@@ -555,13 +563,13 @@ export default function HooksPage() {
                             onClick={() => openEdit(hook)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            Edit
+                            {tc('edit')}
                           </button>
                           <button
                             onClick={() => setDeleteTarget(hook)}
                             className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         </div>
                       </td>
@@ -577,7 +585,7 @@ export default function HooksPage() {
       {/* Add / Edit dialog */}
       <HookDialog
         open={dialogOpen}
-        title={editingHook ? 'Edit Hook' : 'Add Hook'}
+        title={editingHook ? t('hooks.editHook') : t('hooks.addHook')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/agent-config/page.tsx b/it0-web-admin/src/app/(admin)/agent-config/page.tsx
index 6978e9b..07165db 100644
--- a/it0-web-admin/src/app/(admin)/agent-config/page.tsx
+++ b/it0-web-admin/src/app/(admin)/agent-config/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -26,20 +27,14 @@ const DEFAULT_CONFIG: AgentConfig = {
 };
 
 const AVAILABLE_TOOLS = [
-  { name: 'Bash', description: 'Execute shell commands' },
-  { name: 'Read', description: 'Read file contents' },
-  { name: 'Write', description: 'Write / create files' },
-  { name: 'Edit', description: 'Edit existing files' },
-  { name: 'Glob', description: 'Search files by pattern' },
-  { name: 'Grep', description: 'Search file contents' },
-  { name: 'WebFetch', description: 'Fetch web content' },
-  { name: 'WebSearch', description: 'Search the web' },
-  { name: 'NotebookEdit', description: 'Edit Jupyter notebooks' },
+  'Bash', 'Read', 'Write', 'Edit', 'Glob', 'Grep', 'WebFetch', 'WebSearch', 'NotebookEdit',
 ];
 
 /* ---------- page ---------- */
 
 export default function AgentConfigPage() {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   /* ---- load existing config ---- */
@@ -99,7 +94,7 @@ export default function AgentConfigPage() {
   }
 
   function handleSelectAllTools() {
-    setAllowedTools(AVAILABLE_TOOLS.map((t) => t.name));
+    setAllowedTools([...AVAILABLE_TOOLS]);
   }
 
   function handleDeselectAllTools() {
@@ -130,7 +125,7 @@ export default function AgentConfigPage() {
     return (
       <div className="flex items-center gap-2 text-muted-foreground">
         <Loader2 className="h-5 w-5 animate-spin" />
-        <span>Loading agent configuration...</span>
+        <span>{t('loading')}</span>
       </div>
     );
   }
@@ -138,9 +133,9 @@ export default function AgentConfigPage() {
   if (isError) {
     return (
       <div>
-        <h1 className="text-2xl font-bold mb-4">Agent Configuration</h1>
+        <h1 className="text-2xl font-bold mb-4">{t('title')}</h1>
         <p className="text-sm text-destructive mb-4">
-          Failed to load configuration. Using defaults.
+          {t('loadError')}
         </p>
       </div>
     );
@@ -152,9 +147,9 @@ export default function AgentConfigPage() {
     <div className="max-w-3xl">
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Agent Configuration</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage AI engine settings, system prompts, and allowed tools.
+            {t('subtitle')}
           </p>
         </div>
       </div>
@@ -162,9 +157,9 @@ export default function AgentConfigPage() {
       <div className="space-y-8">
         {/* ---- Engine Selection ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">Engine</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('engine.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Select which Claude engine the agent should use.
+            {t('subtitle')}
           </p>
           <div className="flex gap-6">
             <label className="flex items-center gap-2 cursor-pointer">
@@ -177,9 +172,9 @@ export default function AgentConfigPage() {
                 className="h-4 w-4 accent-primary"
               />
               <div>
-                <span className="text-sm font-medium">Claude CLI</span>
+                <span className="text-sm font-medium">{t('engine.claudeCli')}</span>
                 <p className="text-xs text-muted-foreground">
-                  Run via local Claude CLI binary
+                  {t('engine.claudeCliDesc')}
                 </p>
               </div>
             </label>
@@ -193,9 +188,9 @@ export default function AgentConfigPage() {
                 className="h-4 w-4 accent-primary"
               />
               <div>
-                <span className="text-sm font-medium">Claude API</span>
+                <span className="text-sm font-medium">{t('engine.claudeApi')}</span>
                 <p className="text-xs text-muted-foreground">
-                  Call Anthropic API directly
+                  {t('engine.claudeApiDesc')}
                 </p>
               </div>
             </label>
@@ -204,15 +199,15 @@ export default function AgentConfigPage() {
 
         {/* ---- System Prompt ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">System Prompt</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('systemPrompt.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            The base system prompt prepended to every agent interaction.
+            {t('systemPrompt.placeholder')}
           </p>
           <textarea
             value={systemPrompt}
             onChange={(e) => setSystemPrompt(e.target.value)}
             rows={8}
-            placeholder="You are an IT operations agent..."
+            placeholder={t('systemPrompt.placeholder')}
             className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono
                        placeholder:text-muted-foreground focus:outline-none focus:ring-2
                        focus:ring-ring resize-y"
@@ -224,9 +219,9 @@ export default function AgentConfigPage() {
 
         {/* ---- Max Turns ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">Max Turns</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('maxTurns.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Maximum number of agentic turns the agent may take per task.
+            {t('maxTurns.description')}
           </p>
           <div className="flex items-center gap-4">
             <input
@@ -254,9 +249,9 @@ export default function AgentConfigPage() {
 
         {/* ---- Max Budget ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">Max Budget</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('maxBudget.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Maximum dollar spend per task execution (USD).
+            {t('maxBudget.description')}
           </p>
           <div className="flex items-center gap-2">
             <span className="text-sm font-medium text-muted-foreground">$</span>
@@ -276,9 +271,9 @@ export default function AgentConfigPage() {
         <section className="bg-card rounded-lg border p-5">
           <div className="flex justify-between items-start mb-4">
             <div>
-              <h2 className="text-lg font-semibold mb-1">Allowed Tools</h2>
+              <h2 className="text-lg font-semibold mb-1">{t('allowedTools.title')}</h2>
               <p className="text-sm text-muted-foreground">
-                Select which tools the agent is allowed to invoke.
+                {t('allowedTools.title')}
               </p>
             </div>
             <div className="flex gap-2 text-xs">
@@ -287,39 +282,39 @@ export default function AgentConfigPage() {
                 onClick={handleSelectAllTools}
                 className="px-2 py-1 rounded border hover:bg-accent transition-colors"
               >
-                Select All
+                {t('allowedTools.selectAll')}
               </button>
               <button
                 type="button"
                 onClick={handleDeselectAllTools}
                 className="px-2 py-1 rounded border hover:bg-accent transition-colors"
               >
-                Deselect All
+                {t('allowedTools.deselectAll')}
               </button>
             </div>
           </div>
           <div className="grid grid-cols-1 sm:grid-cols-2 gap-3">
             {AVAILABLE_TOOLS.map((tool) => (
               <label
-                key={tool.name}
+                key={tool}
                 className="flex items-start gap-3 p-3 rounded-md border cursor-pointer
                            hover:bg-accent/50 transition-colors"
               >
                 <input
                   type="checkbox"
-                  checked={allowedTools.includes(tool.name)}
-                  onChange={() => handleToolToggle(tool.name)}
+                  checked={allowedTools.includes(tool)}
+                  onChange={() => handleToolToggle(tool)}
                   className="mt-0.5 h-4 w-4 accent-primary"
                 />
                 <div>
-                  <span className="text-sm font-medium">{tool.name}</span>
-                  <p className="text-xs text-muted-foreground">{tool.description}</p>
+                  <span className="text-sm font-medium">{tool}</span>
+                  <p className="text-xs text-muted-foreground">{t(`allowedTools.tools.${tool}`)}</p>
                 </div>
               </label>
             ))}
           </div>
           <p className="text-xs text-muted-foreground mt-3">
-            {allowedTools.length} of {AVAILABLE_TOOLS.length} tools selected
+            {allowedTools.length} / {AVAILABLE_TOOLS.length}
           </p>
         </section>
 
@@ -339,7 +334,7 @@ export default function AgentConfigPage() {
             ) : (
               <Save className="h-4 w-4" />
             )}
-            {isSaving ? 'Saving...' : 'Save Configuration'}
+            {isSaving ? tc('saving') : t('saveConfig')}
           </button>
           <button
             type="button"
@@ -348,11 +343,11 @@ export default function AgentConfigPage() {
                        text-sm font-medium hover:bg-accent transition-colors"
           >
             <RotateCcw className="h-4 w-4" />
-            Reset to Defaults
+            {t('resetDefaults')}
           </button>
           {saveSuccess && (
             <span className="text-sm text-green-600 dark:text-green-400">
-              Configuration saved successfully.
+              {t('saveSuccess')}
             </span>
           )}
         </div>
diff --git a/it0-web-admin/src/app/(admin)/agent-config/sdk/page.tsx b/it0-web-admin/src/app/(admin)/agent-config/sdk/page.tsx
index ee43a2f..b08465b 100644
--- a/it0-web-admin/src/app/(admin)/agent-config/sdk/page.tsx
+++ b/it0-web-admin/src/app/(admin)/agent-config/sdk/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -28,21 +29,14 @@ interface UpdateConfigPayload {
 }
 
 const AVAILABLE_TOOLS = [
-  { name: 'Bash', description: 'Execute shell commands' },
-  { name: 'Read', description: 'Read file contents' },
-  { name: 'Write', description: 'Write / create files' },
-  { name: 'Edit', description: 'Edit existing files' },
-  { name: 'Glob', description: 'Search files by pattern' },
-  { name: 'Grep', description: 'Search file contents' },
-  { name: 'WebFetch', description: 'Fetch web content' },
-  { name: 'WebSearch', description: 'Search the web' },
-  { name: 'NotebookEdit', description: 'Edit Jupyter notebooks' },
-  { name: 'Task', description: 'Launch sub-agent tasks' },
+  'Bash', 'Read', 'Write', 'Edit', 'Glob', 'Grep', 'WebFetch', 'WebSearch', 'NotebookEdit', 'Task',
 ];
 
 /* ---------- page ---------- */
 
 export default function AgentSdkConfigPage() {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   /* ---- load existing config ---- */
@@ -153,7 +147,7 @@ export default function AgentSdkConfigPage() {
     return (
       <div className="flex items-center gap-2 text-muted-foreground">
         <Loader2 className="h-5 w-5 animate-spin" />
-        <span>Loading SDK configuration...</span>
+        <span>{t('sdk.loading')}</span>
       </div>
     );
   }
@@ -161,9 +155,9 @@ export default function AgentSdkConfigPage() {
   if (isError) {
     return (
       <div>
-        <h1 className="text-2xl font-bold mb-4">Agent SDK Configuration</h1>
+        <h1 className="text-2xl font-bold mb-4">{t('sdk.title')}</h1>
         <p className="text-sm text-destructive mb-4">
-          Failed to load configuration. Using defaults.
+          {t('sdk.loadError')}
         </p>
       </div>
     );
@@ -175,9 +169,9 @@ export default function AgentSdkConfigPage() {
     <div className="max-w-3xl">
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Agent SDK Configuration</h1>
+          <h1 className="text-2xl font-bold">{t('sdk.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Configure Claude Agent SDK billing, approval flow, and tool permissions per tenant.
+            {t('sdk.subtitle')}
           </p>
         </div>
       </div>
@@ -185,9 +179,9 @@ export default function AgentSdkConfigPage() {
       <div className="space-y-8">
         {/* ---- Billing Mode ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">Billing Mode</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('sdk.billingMode.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Choose how Claude Agent SDK usage is billed for this tenant.
+            {t('sdk.billingMode.subtitle')}
           </p>
           <div className="flex gap-6">
             <label className="flex items-center gap-2 cursor-pointer">
@@ -200,9 +194,9 @@ export default function AgentSdkConfigPage() {
                 className="h-4 w-4 accent-primary"
               />
               <div>
-                <span className="text-sm font-medium">Subscription</span>
+                <span className="text-sm font-medium">{t('sdk.billingMode.subscription')}</span>
                 <p className="text-xs text-muted-foreground">
-                  Use operator&apos;s Claude login (no API key needed)
+                  {t('sdk.billingMode.subscriptionDesc')}
                 </p>
               </div>
             </label>
@@ -216,9 +210,9 @@ export default function AgentSdkConfigPage() {
                 className="h-4 w-4 accent-primary"
               />
               <div>
-                <span className="text-sm font-medium">API Key</span>
+                <span className="text-sm font-medium">{t('sdk.billingMode.apiKey')}</span>
                 <p className="text-xs text-muted-foreground">
-                  Tenant&apos;s own Anthropic API key (token-based billing)
+                  {t('sdk.billingMode.apiKeyDesc')}
                 </p>
               </div>
             </label>
@@ -228,10 +222,10 @@ export default function AgentSdkConfigPage() {
           {billingMode === 'api_key' && (
             <div className="mt-4 p-4 rounded-md border bg-muted/30">
               <div className="flex items-center justify-between mb-2">
-                <label className="text-sm font-medium">Anthropic API Key</label>
+                <label className="text-sm font-medium">{t('sdk.apiKey.label')}</label>
                 {config?.hasApiKey && (
                   <span className="text-xs text-green-600 dark:text-green-400">
-                    Key configured
+                    {t('sdk.apiKey.configured')}
                   </span>
                 )}
               </div>
@@ -241,7 +235,7 @@ export default function AgentSdkConfigPage() {
                     type={showApiKey ? 'text' : 'password'}
                     value={apiKey}
                     onChange={(e) => setApiKey(e.target.value)}
-                    placeholder={config?.hasApiKey ? 'Enter new key to replace existing' : 'sk-ant-...'}
+                    placeholder={config?.hasApiKey ? t('sdk.apiKey.replacePlaceholder') : t('sdk.apiKey.placeholder')}
                     className="w-full rounded-md border bg-background px-3 py-2 pr-10 text-sm font-mono
                                placeholder:text-muted-foreground focus:outline-none focus:ring-2
                                focus:ring-ring"
@@ -265,12 +259,12 @@ export default function AgentSdkConfigPage() {
                                disabled:opacity-50 transition-colors"
                   >
                     <Trash2 className="h-4 w-4" />
-                    Remove
+                    {t('sdk.apiKey.remove')}
                   </button>
                 )}
               </div>
               <p className="text-xs text-muted-foreground mt-2">
-                API key is encrypted (AES-256-GCM) before storage. Never stored in plaintext.
+                {t('sdk.apiKey.encryptionNote')}
               </p>
             </div>
           )}
@@ -278,10 +272,9 @@ export default function AgentSdkConfigPage() {
 
         {/* ---- L2 Approval Timeout ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">L2 Approval Timeout</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('sdk.approvalTimeout.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            For high-risk commands (L2), how long to wait for manual approval before auto-approving.
-            Set to 0 to disable auto-approve (wait indefinitely).
+            {t('sdk.approvalTimeout.subtitle')}
           </p>
           <div className="flex items-center gap-4">
             <input
@@ -306,55 +299,54 @@ export default function AgentSdkConfigPage() {
                 className="w-20 rounded-md border bg-background px-3 py-1.5 text-sm text-center
                            focus:outline-none focus:ring-2 focus:ring-ring"
               />
-              <span className="text-sm text-muted-foreground">sec</span>
+              <span className="text-sm text-muted-foreground">{t('sdk.approvalTimeout.unit')}</span>
             </div>
           </div>
           <p className="text-xs text-muted-foreground mt-2">
             {approvalTimeout === 0
-              ? 'Auto-approve disabled — commands will wait for manual approval indefinitely.'
-              : `Commands auto-approved after ${approvalTimeout} seconds without response.`}
+              ? t('sdk.approvalTimeout.autoApproveDisabled')
+              : t('sdk.approvalTimeout.autoApproveAfter', { seconds: approvalTimeout })}
           </p>
         </section>
 
         {/* ---- Tool Whitelist / Blacklist ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">Tool Permissions</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('sdk.toolPermissions.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Override tool access per tenant. Empty whitelist means use RBAC defaults.
-            Blacklisted tools are always denied regardless of role.
+            {t('sdk.toolPermissions.subtitle')}
           </p>
 
           <div className="overflow-hidden rounded-md border">
             <table className="w-full text-sm">
               <thead>
                 <tr className="bg-muted/50">
-                  <th className="text-left px-4 py-2 font-medium">Tool</th>
-                  <th className="text-left px-4 py-2 font-medium">Description</th>
-                  <th className="text-center px-4 py-2 font-medium w-24">Whitelist</th>
-                  <th className="text-center px-4 py-2 font-medium w-24">Blacklist</th>
+                  <th className="text-left px-4 py-2 font-medium">{t('sdk.toolPermissions.tool')}</th>
+                  <th className="text-left px-4 py-2 font-medium">{t('sdk.toolPermissions.description')}</th>
+                  <th className="text-center px-4 py-2 font-medium w-24">{t('sdk.toolPermissions.whitelist')}</th>
+                  <th className="text-center px-4 py-2 font-medium w-24">{t('sdk.toolPermissions.blacklist')}</th>
                 </tr>
               </thead>
               <tbody>
                 {AVAILABLE_TOOLS.map((tool) => (
                   <tr
-                    key={tool.name}
+                    key={tool}
                     className="border-t hover:bg-accent/30 transition-colors"
                   >
-                    <td className="px-4 py-2 font-mono text-xs">{tool.name}</td>
-                    <td className="px-4 py-2 text-muted-foreground text-xs">{tool.description}</td>
+                    <td className="px-4 py-2 font-mono text-xs">{tool}</td>
+                    <td className="px-4 py-2 text-muted-foreground text-xs">{t(`allowedTools.tools.${tool}`)}</td>
                     <td className="px-4 py-2 text-center">
                       <input
                         type="checkbox"
-                        checked={toolWhitelist.includes(tool.name)}
-                        onChange={() => handleWhitelistToggle(tool.name)}
+                        checked={toolWhitelist.includes(tool)}
+                        onChange={() => handleWhitelistToggle(tool)}
                         className="h-4 w-4 accent-primary cursor-pointer"
                       />
                     </td>
                     <td className="px-4 py-2 text-center">
                       <input
                         type="checkbox"
-                        checked={toolBlacklist.includes(tool.name)}
-                        onChange={() => handleBlacklistToggle(tool.name)}
+                        checked={toolBlacklist.includes(tool)}
+                        onChange={() => handleBlacklistToggle(tool)}
                         className="h-4 w-4 accent-destructive cursor-pointer"
                       />
                     </td>
@@ -365,34 +357,34 @@ export default function AgentSdkConfigPage() {
           </div>
 
           <div className="flex gap-4 mt-3 text-xs text-muted-foreground">
-            <span>Whitelist: {toolWhitelist.length || 'none (use RBAC defaults)'}</span>
-            <span>Blacklist: {toolBlacklist.length || 'none'}</span>
+            <span>{toolWhitelist.length ? t('sdk.toolPermissions.whitelistCount', { count: toolWhitelist.length }) : t('sdk.toolPermissions.whitelistNone')}</span>
+            <span>{toolBlacklist.length ? t('sdk.toolPermissions.blacklistCount', { count: toolBlacklist.length }) : t('sdk.toolPermissions.blacklistNone')}</span>
           </div>
         </section>
 
         {/* ---- RBAC Info ---- */}
         <section className="bg-card rounded-lg border p-5">
-          <h2 className="text-lg font-semibold mb-1">RBAC Tool Access (Reference)</h2>
+          <h2 className="text-lg font-semibold mb-1">{t('sdk.rbac.title')}</h2>
           <p className="text-sm text-muted-foreground mb-4">
-            Default tool access per role (applied when whitelist is empty).
+            {t('sdk.rbac.subtitle')}
           </p>
           <div className="space-y-2 text-sm">
             <div className="flex gap-2">
-              <span className="font-medium w-20">Admin</span>
+              <span className="font-medium w-20">{t('sdk.rbac.admin')}</span>
               <span className="text-muted-foreground font-mono text-xs">
-                All tools (Bash, Read, Write, Edit, Glob, Grep, WebFetch, WebSearch, NotebookEdit, Task)
+                {t('sdk.rbac.adminTools')}
               </span>
             </div>
             <div className="flex gap-2">
-              <span className="font-medium w-20">Operator</span>
+              <span className="font-medium w-20">{t('sdk.rbac.operator')}</span>
               <span className="text-muted-foreground font-mono text-xs">
-                Bash, Read, Write, Edit, Glob, Grep
+                {t('sdk.rbac.operatorTools')}
               </span>
             </div>
             <div className="flex gap-2">
-              <span className="font-medium w-20">Viewer</span>
+              <span className="font-medium w-20">{t('sdk.rbac.viewer')}</span>
               <span className="text-muted-foreground font-mono text-xs">
-                Read, Glob, Grep (read-only)
+                {t('sdk.rbac.viewerTools')}
               </span>
             </div>
           </div>
@@ -414,7 +406,7 @@ export default function AgentSdkConfigPage() {
             ) : (
               <Save className="h-4 w-4" />
             )}
-            {isSaving ? 'Saving...' : 'Save Configuration'}
+            {isSaving ? tc('saving') : t('saveConfig')}
           </button>
           <button
             type="button"
@@ -423,11 +415,11 @@ export default function AgentSdkConfigPage() {
                        text-sm font-medium hover:bg-accent transition-colors"
           >
             <RotateCcw className="h-4 w-4" />
-            Reset to Defaults
+            {t('resetDefaults')}
           </button>
           {saveSuccess && (
             <span className="text-sm text-green-600 dark:text-green-400">
-              Configuration saved successfully.
+              {t('saveSuccess')}
             </span>
           )}
         </div>
diff --git a/it0-web-admin/src/app/(admin)/agent-config/skills/[name]/page.tsx b/it0-web-admin/src/app/(admin)/agent-config/skills/[name]/page.tsx
index 79c8881..fc27467 100644
--- a/it0-web-admin/src/app/(admin)/agent-config/skills/[name]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/agent-config/skills/[name]/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
 import { apiClient } from '@/infrastructure/api/api-client';
@@ -104,15 +105,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Skill</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('skills.detail.deleteSkill')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{name}</strong>? This action cannot be undone.
+          {tc('confirmDelete')} <strong>{name}</strong>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -120,14 +124,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -152,6 +156,8 @@ function formatDate(dateStr: string): string {
 // ---------------------------------------------------------------------------
 
 export default function SkillDetailPage() {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
@@ -286,10 +292,10 @@ export default function SkillDetailPage() {
           onClick={() => router.push('/agent-config/skills')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Skills
+          &larr; {t('skills.detail.backToSkills')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading skill...
+          {t('skills.detail.loading')}
         </div>
       </div>
     );
@@ -303,10 +309,10 @@ export default function SkillDetailPage() {
           onClick={() => router.push('/agent-config/skills')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Skills
+          &larr; {t('skills.detail.backToSkills')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load skill: {(error as Error).message}
+          {t('skills.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -320,10 +326,10 @@ export default function SkillDetailPage() {
           onClick={() => router.push('/agent-config/skills')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Skills
+          &larr; {t('skills.detail.backToSkills')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Skill not found.
+          {t('skills.detail.notFound')}
         </div>
       </div>
     );
@@ -339,20 +345,20 @@ export default function SkillDetailPage() {
             onClick={() => router.push('/agent-config/skills')}
             className="text-sm text-muted-foreground hover:text-foreground inline-flex items-center gap-1"
           >
-            &larr; Back
+            &larr; {tc('back')}
           </button>
           <div className="h-6 w-px bg-border" />
           <div>
             <h1 className="text-2xl font-bold">{skill.name}</h1>
             <p className="text-sm text-muted-foreground mt-0.5">
-              {skill.description || 'No description'}
+              {skill.description || tc('noData')}
             </p>
           </div>
         </div>
         <div className="flex items-center gap-2">
           {skill.isBuiltIn && (
             <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400">
-              Built-in
+              {t('skills.detail.builtIn')}
             </span>
           )}
           <span
@@ -363,7 +369,7 @@ export default function SkillDetailPage() {
                 : 'bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300',
             )}
           >
-            {skill.enabled ? 'Enabled' : 'Disabled'}
+            {skill.enabled ? t('skills.detail.enabled') : t('skills.detail.disabled')}
           </span>
         </div>
       </div>
@@ -381,17 +387,17 @@ export default function SkillDetailPage() {
         <div className="lg:col-span-2 space-y-6">
           {/* Overview card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Overview</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('skills.detail.overview')}</h2>
             <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Name
+                  {tc('name')}
                 </label>
                 <p className="text-sm mt-1 font-mono">{skill.name}</p>
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Type
+                  {tc('type')}
                 </label>
                 <p className="mt-1">
                   {skill.isBuiltIn ? (
@@ -400,22 +406,22 @@ export default function SkillDetailPage() {
                     </span>
                   ) : (
                     <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300">
-                      Custom
+                      {t('skills.detail.custom')}
                     </span>
                   )}
                 </p>
               </div>
               <div className="sm:col-span-2">
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Description
+                  {tc('description')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
-                  {skill.description || 'No description provided.'}
+                  {skill.description || tc('noData')}
                 </p>
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Created
+                  {tc('created')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
                   {formatDate(skill.createdAt)}
@@ -423,7 +429,7 @@ export default function SkillDetailPage() {
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Updated
+                  {tc('updated')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
                   {formatDate(skill.updatedAt)}
@@ -435,7 +441,7 @@ export default function SkillDetailPage() {
           {/* Prompt Template section */}
           <div className="border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Prompt Template</h2>
+              <h2 className="text-lg font-semibold">{t('skills.detail.promptTemplate')}</h2>
               <div className="flex items-center gap-2">
                 {isEditingPrompt ? (
                   <>
@@ -443,14 +449,14 @@ export default function SkillDetailPage() {
                       onClick={handleCancelEditPrompt}
                       className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                     >
-                      Cancel
+                      {tc('cancel')}
                     </button>
                     <button
                       onClick={handleSavePrompt}
                       disabled={updateMutation.isPending}
                       className="px-3 py-1.5 text-xs rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors"
                     >
-                      {updateMutation.isPending ? 'Saving...' : 'Save'}
+                      {updateMutation.isPending ? tc('saving') : tc('save')}
                     </button>
                   </>
                 ) : (
@@ -458,7 +464,7 @@ export default function SkillDetailPage() {
                     onClick={handleStartEditPrompt}
                     className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                   >
-                    Edit
+                    {tc('edit')}
                   </button>
                 )}
               </div>
@@ -473,7 +479,7 @@ export default function SkillDetailPage() {
               />
             ) : (
               <div className="bg-gray-950 text-gray-200 font-mono text-sm p-4 rounded-md whitespace-pre-wrap min-h-[300px]">
-                {skill.promptTemplate || 'No prompt template defined.'}
+                {skill.promptTemplate || t('skills.detail.noPrompt')}
               </div>
             )}
           </div>
@@ -481,7 +487,7 @@ export default function SkillDetailPage() {
           {/* Allowed Tools section */}
           <div className="border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Allowed Tools</h2>
+              <h2 className="text-lg font-semibold">{t('skills.detail.allowedTools')}</h2>
               <div className="flex items-center gap-2">
                 {isEditingTools ? (
                   <>
@@ -489,14 +495,14 @@ export default function SkillDetailPage() {
                       onClick={handleCancelEditTools}
                       className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                     >
-                      Cancel
+                      {tc('cancel')}
                     </button>
                     <button
                       onClick={handleSaveTools}
                       disabled={updateMutation.isPending}
                       className="px-3 py-1.5 text-xs rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors"
                     >
-                      {updateMutation.isPending ? 'Saving...' : 'Save'}
+                      {updateMutation.isPending ? tc('saving') : tc('save')}
                     </button>
                   </>
                 ) : (
@@ -504,7 +510,7 @@ export default function SkillDetailPage() {
                     onClick={handleStartEditTools}
                     className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                   >
-                    Edit
+                    {tc('edit')}
                   </button>
                 )}
               </div>
@@ -531,7 +537,7 @@ export default function SkillDetailPage() {
               <div className="flex flex-wrap gap-2">
                 {skill.allowedTools.length === 0 ? (
                   <p className="text-sm text-muted-foreground">
-                    No tools configured.
+                    {t('skills.detail.noTools')}
                   </p>
                 ) : (
                   skill.allowedTools.map((tool) => (
@@ -552,12 +558,12 @@ export default function SkillDetailPage() {
         <div className="lg:col-span-1 space-y-6">
           {/* Configuration card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Configuration</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('skills.detail.configuration')}</h2>
             <div className="space-y-5">
               {/* Type */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Type
+                  {tc('type')}
                 </label>
                 <p className="mt-1.5">
                   {skill.isBuiltIn ? (
@@ -566,7 +572,7 @@ export default function SkillDetailPage() {
                     </span>
                   ) : (
                     <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300">
-                      Custom
+                      {t('skills.detail.custom')}
                     </span>
                   )}
                 </p>
@@ -575,20 +581,20 @@ export default function SkillDetailPage() {
               {/* Enabled toggle */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide block mb-1.5">
-                  Status
+                  {tc('status')}
                 </label>
                 <ToggleSwitch
                   checked={skill.enabled}
                   disabled={updateMutation.isPending}
                   onChange={handleToggleEnabled}
-                  label={skill.enabled ? 'Enabled' : 'Disabled'}
+                  label={skill.enabled ? tc('enabled') : tc('disabled')}
                 />
               </div>
 
               {/* Allowed Tools count */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Allowed Tools
+                  {t('skills.detail.allowedTools')}
                 </label>
                 <p className="text-sm mt-1 font-medium">
                   {skill.allowedTools.length} tool{skill.allowedTools.length !== 1 ? 's' : ''} configured
@@ -599,7 +605,7 @@ export default function SkillDetailPage() {
 
           {/* Quick Actions card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('skills.detail.quickActions')}</h2>
             <div className="space-y-3">
               {/* Duplicate */}
               <button
@@ -607,7 +613,7 @@ export default function SkillDetailPage() {
                 disabled={duplicateMutation.isPending}
                 className="w-full px-4 py-2 text-sm rounded-md border border-input hover:bg-accent font-medium transition-colors disabled:opacity-50"
               >
-                {duplicateMutation.isPending ? 'Duplicating...' : 'Duplicate Skill'}
+                {duplicateMutation.isPending ? tc('loading') : t('skills.detail.duplicateSkill')}
               </button>
 
               {/* Delete (only for non-built-in) */}
@@ -617,13 +623,13 @@ export default function SkillDetailPage() {
                   disabled={deleteMutation.isPending}
                   className="w-full px-4 py-2 text-sm rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 font-medium transition-colors disabled:opacity-50"
                 >
-                  Delete Skill
+                  {t('skills.detail.deleteSkill')}
                 </button>
               )}
 
               {skill.isBuiltIn && (
                 <p className="text-xs text-muted-foreground">
-                  Built-in skills cannot be deleted.
+                  {t('skills.detail.builtIn')}
                 </p>
               )}
             </div>
@@ -631,22 +637,22 @@ export default function SkillDetailPage() {
 
           {/* Metadata */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Metadata</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('skills.detail.metadata')}</h2>
             <div className="space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Name</span>
+                <span className="text-sm text-muted-foreground">{tc('name')}</span>
                 <code className="text-xs font-mono text-muted-foreground bg-muted px-1.5 py-0.5 rounded">
                   {skill.name}
                 </code>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Created</span>
+                <span className="text-sm text-muted-foreground">{tc('created')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(skill.createdAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Updated</span>
+                <span className="text-sm text-muted-foreground">{tc('updated')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(skill.updatedAt)}
                 </span>
diff --git a/it0-web-admin/src/app/(admin)/agent-config/skills/page.tsx b/it0-web-admin/src/app/(admin)/agent-config/skills/page.tsx
index 7106e41..dd949ea 100644
--- a/it0-web-admin/src/app/(admin)/agent-config/skills/page.tsx
+++ b/it0-web-admin/src/app/(admin)/agent-config/skills/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { cn } from '@/lib/utils';
@@ -41,13 +42,8 @@ interface SkillsResponse {
 
 const SKILL_QUERY_KEY = ['skills'] as const;
 
-const CATEGORIES: { label: string; value: Skill['category'] }[] = [
-  { label: 'Inspection', value: 'inspection' },
-  { label: 'Deployment', value: 'deployment' },
-  { label: 'Maintenance', value: 'maintenance' },
-  { label: 'Security', value: 'security' },
-  { label: 'Monitoring', value: 'monitoring' },
-  { label: 'Custom', value: 'custom' },
+const CATEGORY_VALUES: Skill['category'][] = [
+  'inspection', 'deployment', 'maintenance', 'security', 'monitoring', 'custom',
 ];
 
 const CATEGORY_STYLES: Record<Skill['category'], string> = {
@@ -73,6 +69,7 @@ const EMPTY_FORM: SkillFormData = {
 // ---------------------------------------------------------------------------
 
 function CategoryBadge({ category }: { category: Skill['category'] }) {
+  const { t } = useTranslation('agent-config');
   return (
     <span
       className={cn(
@@ -80,7 +77,7 @@ function CategoryBadge({ category }: { category: Skill['category'] }) {
         CATEGORY_STYLES[category],
       )}
     >
-      {category}
+      {t(`skills.categories.${category}`)}
     </span>
   );
 }
@@ -90,6 +87,7 @@ function CategoryBadge({ category }: { category: Skill['category'] }) {
 // ---------------------------------------------------------------------------
 
 function EnabledBadge({ enabled }: { enabled: boolean }) {
+  const { t: tc } = useTranslation('common');
   return (
     <span
       className={cn(
@@ -99,7 +97,7 @@ function EnabledBadge({ enabled }: { enabled: boolean }) {
           : 'bg-gray-100 text-gray-800 dark:bg-gray-900/30 dark:text-gray-400',
       )}
     >
-      {enabled ? 'Enabled' : 'Disabled'}
+      {enabled ? tc('enabled') : tc('disabled')}
     </span>
   );
 }
@@ -127,6 +125,9 @@ function SkillDialog({
   onChange: (field: keyof SkillFormData, value: string | boolean) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
@@ -142,7 +143,7 @@ function SkillDialog({
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('skills.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -161,7 +162,7 @@ function SkillDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('skills.form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -173,15 +174,15 @@ function SkillDialog({
 
           {/* category */}
           <div>
-            <label className="block text-sm font-medium mb-1">Category</label>
+            <label className="block text-sm font-medium mb-1">{t('skills.form.category')}</label>
             <select
               value={form.category}
               onChange={(e) => onChange('category', e.target.value)}
               className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
             >
-              {CATEGORIES.map((cat) => (
-                <option key={cat.value} value={cat.value}>
-                  {cat.label}
+              {CATEGORY_VALUES.map((cat) => (
+                <option key={cat} value={cat}>
+                  {t(`skills.categories.${cat}`)}
                 </option>
               ))}
             </select>
@@ -189,7 +190,7 @@ function SkillDialog({
 
           {/* script */}
           <div>
-            <label className="block text-sm font-medium mb-1">Script</label>
+            <label className="block text-sm font-medium mb-1">{t('skills.form.script')}</label>
             <textarea
               value={form.script}
               onChange={(e) => onChange('script', e.target.value)}
@@ -200,7 +201,7 @@ function SkillDialog({
 
           {/* tags */}
           <div>
-            <label className="block text-sm font-medium mb-1">Tags</label>
+            <label className="block text-sm font-medium mb-1">{t('skills.form.tags')}</label>
             <input
               type="text"
               value={form.tags}
@@ -221,7 +222,7 @@ function SkillDialog({
               />
               <div className="w-9 h-5 bg-gray-200 peer-focus:outline-none peer-focus:ring-2 peer-focus:ring-ring rounded-full peer dark:bg-gray-700 peer-checked:after:translate-x-full rtl:peer-checked:after:-translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:start-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-4 after:w-4 after:transition-all dark:after:border-gray-600 peer-checked:bg-primary" />
             </label>
-            <span className="text-sm font-medium">Enabled</span>
+            <span className="text-sm font-medium">{t('skills.form.enabled')}</span>
           </div>
         </div>
 
@@ -233,7 +234,7 @@ function SkillDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -241,7 +242,7 @@ function SkillDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -266,15 +267,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Skill</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('skills.deleteSkill')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{skillName}</strong>? This action cannot be undone.
+          {tc('confirmDelete')} <strong>{skillName}</strong>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -282,14 +286,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -302,6 +306,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function SkillsPage() {
+  const { t } = useTranslation('agent-config');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -424,30 +430,30 @@ export default function SkillsPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Skills</h1>
+          <h1 className="text-2xl font-bold">{t('skills.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage Claude Code skills for the AI agent
+            {t('skills.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Skill
+          {t('skills.addSkill')}
         </button>
       </div>
 
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load skills: {(error as Error).message}
+          {t('skills.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading skills...
+          {t('skills.loading')}
         </div>
       )}
 
@@ -455,13 +461,13 @@ export default function SkillsPage() {
       {!isLoading && !error && skills.length === 0 && (
         <div className="text-center py-12">
           <p className="text-sm text-muted-foreground mb-4">
-            No skills configured yet. Add your first skill to get started.
+            {t('skills.empty')}
           </p>
           <button
             onClick={openAdd}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90"
           >
-            Add Skill
+            {t('skills.addSkill')}
           </button>
         </div>
       )}
@@ -482,7 +488,7 @@ export default function SkillsPage() {
 
               {/* Description */}
               <p className="text-xs text-muted-foreground line-clamp-2 mt-1">
-                {skill.description || 'No description'}
+                {skill.description || tc('noData')}
               </p>
 
               {/* Category badge */}
@@ -511,13 +517,13 @@ export default function SkillsPage() {
                     onClick={() => openEdit(skill)}
                     className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                   >
-                    Edit
+                    {tc('edit')}
                   </button>
                   <button
                     onClick={() => setDeleteTarget(skill)}
                     className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                   >
-                    Delete
+                    {tc('delete')}
                   </button>
                 </div>
               </div>
@@ -529,7 +535,7 @@ export default function SkillsPage() {
       {/* Add / Edit dialog */}
       <SkillDialog
         open={dialogOpen}
-        title={editingSkill ? 'Edit Skill' : 'Add Skill'}
+        title={editingSkill ? t('skills.editSkill') : t('skills.addSkill')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/audit/logs/page.tsx b/it0-web-admin/src/app/(admin)/audit/logs/page.tsx
index 5975a21..0476fc9 100644
--- a/it0-web-admin/src/app/(admin)/audit/logs/page.tsx
+++ b/it0-web-admin/src/app/(admin)/audit/logs/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useMemo, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -45,6 +46,8 @@ const PAGE_SIZE_OPTIONS = [10, 25, 50, 100];
 // ── Main Component ──────────────────────────────────────────────────────────
 
 export default function AuditLogsPage() {
+  const { t } = useTranslation('audit');
+  const { t: tc } = useTranslation('common');
   const [filters, setFilters] = useState<Filters>({
     dateFrom: '',
     dateTo: '',
@@ -99,7 +102,7 @@ export default function AuditLogsPage() {
   const exportCsv = useCallback(() => {
     if (logs.length === 0) return;
 
-    const headers = ['Timestamp', 'Action Type', 'Actor Type', 'Actor ID', 'Resource Type', 'Resource ID', 'Description'];
+    const headers = [t('logs.table.timestamp'), t('logs.table.action'), t('logs.table.actorType'), t('logs.table.actorId'), t('logs.table.resourceType'), t('logs.table.resourceId'), t('logs.table.description')];
     const rows = logs.map((log) => [
       log.timestamp,
       log.actionType,
@@ -120,7 +123,7 @@ export default function AuditLogsPage() {
     link.click();
     document.body.removeChild(link);
     URL.revokeObjectURL(url);
-  }, [logs]);
+  }, [logs, t]);
 
   // ── Render ─────────────────────────────────────────────────────────────────
 
@@ -128,9 +131,9 @@ export default function AuditLogsPage() {
     <div>
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Audit Logs</h1>
+          <h1 className="text-2xl font-bold">{t('logs.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            View immutable audit trail of all operations and configuration changes.
+            {t('logs.subtitle')}
           </p>
         </div>
         <button
@@ -138,14 +141,14 @@ export default function AuditLogsPage() {
           disabled={logs.length === 0}
           className="px-4 py-2 border rounded-md text-sm hover:bg-accent disabled:opacity-50 disabled:cursor-not-allowed"
         >
-          Export CSV
+          {t('logs.exportCsv')}
         </button>
       </div>
 
       {/* Filters */}
       <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-5 gap-3 mb-4 p-4 bg-card border rounded-lg">
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Date From</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('logs.filters.dateFrom')}</label>
           <input
             type="date"
             value={filters.dateFrom}
@@ -154,7 +157,7 @@ export default function AuditLogsPage() {
           />
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Date To</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('logs.filters.dateTo')}</label>
           <input
             type="date"
             value={filters.dateTo}
@@ -163,46 +166,46 @@ export default function AuditLogsPage() {
           />
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Action Type</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('logs.filters.actionType')}</label>
           <select
             value={filters.actionType}
             onChange={(e) => updateFilter('actionType', e.target.value)}
             className="w-full px-2 py-1.5 bg-input border rounded-md text-sm"
           >
-            {ACTION_TYPES.map((t) => (
-              <option key={t} value={t}>{t || 'All'}</option>
+            {ACTION_TYPES.map((at) => (
+              <option key={at} value={at}>{at || tc('all')}</option>
             ))}
           </select>
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Actor Type</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('logs.filters.actorType')}</label>
           <select
             value={filters.actorType}
             onChange={(e) => updateFilter('actorType', e.target.value)}
             className="w-full px-2 py-1.5 bg-input border rounded-md text-sm"
           >
-            {ACTOR_TYPES.map((t) => (
-              <option key={t} value={t}>{t || 'All'}</option>
+            {ACTOR_TYPES.map((at) => (
+              <option key={at} value={at}>{at || tc('all')}</option>
             ))}
           </select>
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Resource Type</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('logs.filters.resourceType')}</label>
           <select
             value={filters.resourceType}
             onChange={(e) => updateFilter('resourceType', e.target.value)}
             className="w-full px-2 py-1.5 bg-input border rounded-md text-sm"
           >
-            {RESOURCE_TYPES.map((t) => (
-              <option key={t} value={t}>{t || 'All'}</option>
+            {RESOURCE_TYPES.map((rt) => (
+              <option key={rt} value={rt}>{rt || tc('all')}</option>
             ))}
           </select>
         </div>
       </div>
 
       {/* Loading / Error */}
-      {isLoading && <p className="text-muted-foreground py-4">Loading audit logs...</p>}
-      {error && <p className="text-red-500 py-4">Error loading logs: {(error as Error).message}</p>}
+      {isLoading && <p className="text-muted-foreground py-4">{t('logs.loading')}</p>}
+      {error && <p className="text-red-500 py-4">{t('logs.loadError')} {(error as Error).message}</p>}
 
       {/* Table */}
       {!isLoading && !error && (
@@ -212,13 +215,13 @@ export default function AuditLogsPage() {
               <thead>
                 <tr className="border-b bg-muted/50 text-left">
                   <th className="py-2 px-3 font-medium w-8"></th>
-                  <th className="py-2 px-3 font-medium">Timestamp</th>
-                  <th className="py-2 px-3 font-medium">Action</th>
-                  <th className="py-2 px-3 font-medium">Actor Type</th>
-                  <th className="py-2 px-3 font-medium">Actor ID</th>
-                  <th className="py-2 px-3 font-medium">Resource Type</th>
-                  <th className="py-2 px-3 font-medium">Resource ID</th>
-                  <th className="py-2 px-3 font-medium">Description</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.timestamp')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.action')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.actorType')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.actorId')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.resourceType')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.resourceId')}</th>
+                  <th className="py-2 px-3 font-medium">{t('logs.table.description')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -233,7 +236,7 @@ export default function AuditLogsPage() {
                 {logs.length === 0 && (
                   <tr>
                     <td colSpan={8} className="py-8 text-center text-muted-foreground">
-                      No audit logs found for the current filters.
+                      {t('logs.empty')}
                     </td>
                   </tr>
                 )}
@@ -244,7 +247,7 @@ export default function AuditLogsPage() {
           {/* Pagination */}
           <div className="flex items-center justify-between mt-4">
             <div className="flex items-center gap-2 text-sm text-muted-foreground">
-              <span>Rows per page:</span>
+              <span>{t('logs.pagination.rowsPerPage')}:</span>
               <select
                 value={pageSize}
                 onChange={(e) => handlePageSizeChange(Number(e.target.value))}
@@ -257,7 +260,7 @@ export default function AuditLogsPage() {
               <span className="ml-2">
                 {total > 0
                   ? `${(page - 1) * pageSize + 1}--${Math.min(page * pageSize, total)} of ${total}`
-                  : '0 results'}
+                  : tc('noResults')}
               </span>
             </div>
             <div className="flex items-center gap-2">
@@ -266,17 +269,17 @@ export default function AuditLogsPage() {
                 disabled={page <= 1}
                 className="px-3 py-1.5 border rounded-md text-sm hover:bg-accent disabled:opacity-50 disabled:cursor-not-allowed"
               >
-                Previous
+                {t('logs.pagination.previous')}
               </button>
               <span className="text-sm text-muted-foreground">
-                Page {page} of {totalPages}
+                {t('logs.pagination.pageOf', { current: page, total: totalPages })}
               </span>
               <button
                 onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
                 disabled={page >= totalPages}
                 className="px-3 py-1.5 border rounded-md text-sm hover:bg-accent disabled:opacity-50 disabled:cursor-not-allowed"
               >
-                Next
+                {t('logs.pagination.next')}
               </button>
             </div>
           </div>
@@ -307,6 +310,7 @@ function LogRow({
   isExpanded: boolean;
   onToggle: () => void;
 }) {
+  const { t } = useTranslation('audit');
   const formattedTime = useMemo(() => {
     try {
       return new Date(log.timestamp).toLocaleString();
@@ -341,7 +345,7 @@ function LogRow({
       {isExpanded && (
         <tr className="border-b">
           <td colSpan={8} className="p-4 bg-muted/30">
-            <p className="text-xs font-medium text-muted-foreground mb-2">Full Detail</p>
+            <p className="text-xs font-medium text-muted-foreground mb-2">{t('logs.fullDetail')}</p>
             <pre className="text-xs bg-background border rounded-md p-3 overflow-x-auto max-h-64 overflow-y-auto">
               <code>{JSON.stringify(log.detail ?? log, null, 2)}</code>
             </pre>
diff --git a/it0-web-admin/src/app/(admin)/audit/replay/page.tsx b/it0-web-admin/src/app/(admin)/audit/replay/page.tsx
index 04a699f..2b35f48 100644
--- a/it0-web-admin/src/app/(admin)/audit/replay/page.tsx
+++ b/it0-web-admin/src/app/(admin)/audit/replay/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect, useRef, useCallback, useMemo } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -60,11 +61,11 @@ interface Filters {
 // -- Constants ---------------------------------------------------------------
 
 const STATUS_OPTIONS = [
-  { label: 'All', value: '' },
-  { label: 'Completed', value: 'completed' },
-  { label: 'Failed', value: 'failed' },
-  { label: 'Cancelled', value: 'cancelled' },
-  { label: 'Running', value: 'running' },
+  { labelKey: 'replay.statuses.all', value: '' },
+  { labelKey: 'replay.statuses.completed', value: 'completed' },
+  { labelKey: 'replay.statuses.failed', value: 'failed' },
+  { labelKey: 'replay.statuses.cancelled', value: 'cancelled' },
+  { labelKey: 'replay.statuses.running', value: 'running' },
 ];
 
 const STATUS_BADGE_STYLES: Record<string, string> = {
@@ -85,15 +86,15 @@ const EVENT_TYPE_STYLES: Record<string, string> = {
   session_completed: 'bg-green-100 text-green-800',
 };
 
-const EVENT_TYPE_LABELS: Record<string, string> = {
-  command_executed: 'Command Executed',
-  output_received: 'Output Received',
-  approval_requested: 'Approval Requested',
-  approval_granted: 'Approval Granted',
-  approval_denied: 'Approval Denied',
-  error: 'Error',
-  session_started: 'Session Started',
-  session_completed: 'Session Completed',
+const EVENT_TYPE_LABEL_KEYS: Record<string, string> = {
+  command_executed: 'replay.events.types.commandExecuted',
+  output_received: 'replay.events.types.outputReceived',
+  approval_requested: 'replay.events.types.approvalRequested',
+  approval_granted: 'replay.events.types.approvalGranted',
+  approval_denied: 'replay.events.types.approvalDenied',
+  error: 'replay.events.types.error',
+  session_started: 'replay.events.types.sessionStarted',
+  session_completed: 'replay.events.types.sessionCompleted',
 };
 
 const RISK_LEVEL_STYLES: Record<string, string> = {
@@ -146,6 +147,7 @@ function truncateId(id: string, maxLen = 12): string {
 // -- Main Component ----------------------------------------------------------
 
 export default function SessionReplayPage() {
+  const { t } = useTranslation('audit');
   const [filters, setFilters] = useState<Filters>({
     dateFrom: '',
     dateTo: '',
@@ -315,16 +317,16 @@ export default function SessionReplayPage() {
     <div>
       {/* Header */}
       <div className="mb-6">
-        <h1 className="text-2xl font-bold">Session Replay</h1>
+        <h1 className="text-2xl font-bold">{t('replay.title')}</h1>
         <p className="text-sm text-muted-foreground mt-1">
-          Review agent session execution history
+          {t('replay.subtitle')}
         </p>
       </div>
 
       {/* Filters */}
       <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-3 mb-4 p-4 bg-card border rounded-lg">
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Date From</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('replay.filters.dateFrom')}</label>
           <input
             type="date"
             value={filters.dateFrom}
@@ -333,7 +335,7 @@ export default function SessionReplayPage() {
           />
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Date To</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('replay.filters.dateTo')}</label>
           <input
             type="date"
             value={filters.dateTo}
@@ -342,7 +344,7 @@ export default function SessionReplayPage() {
           />
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Status</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('replay.filters.status')}</label>
           <select
             value={filters.status}
             onChange={(e) => updateFilter('status', e.target.value)}
@@ -350,18 +352,18 @@ export default function SessionReplayPage() {
           >
             {STATUS_OPTIONS.map((opt) => (
               <option key={opt.value} value={opt.value}>
-                {opt.label}
+                {t(opt.labelKey)}
               </option>
             ))}
           </select>
         </div>
         <div>
-          <label className="block text-xs text-muted-foreground mb-1">Search</label>
+          <label className="block text-xs text-muted-foreground mb-1">{t('replay.filters.search')}</label>
           <input
             type="text"
             value={filters.search}
             onChange={(e) => updateFilter('search', e.target.value)}
-            placeholder="Session ID or task description..."
+            placeholder={t('replay.filters.searchPlaceholder')}
             className="w-full px-2 py-1.5 bg-input border rounded-md text-sm"
           />
         </div>
@@ -369,11 +371,11 @@ export default function SessionReplayPage() {
 
       {/* Loading / Error for sessions */}
       {sessionsLoading && (
-        <p className="text-muted-foreground py-4">Loading sessions...</p>
+        <p className="text-muted-foreground py-4">{t('replay.loading')}</p>
       )}
       {sessionsError && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load sessions: {(sessionsError as Error).message}
+          {t('replay.loadError')} {(sessionsError as Error).message}
         </div>
       )}
 
@@ -383,12 +385,12 @@ export default function SessionReplayPage() {
           <table className="w-full text-sm">
             <thead>
               <tr className="border-b bg-muted/50 text-left">
-                <th className="py-2 px-3 font-medium">Session ID</th>
-                <th className="py-2 px-3 font-medium">Task Description</th>
-                <th className="py-2 px-3 font-medium">Status</th>
-                <th className="py-2 px-3 font-medium">Duration</th>
-                <th className="py-2 px-3 font-medium">Commands</th>
-                <th className="py-2 px-3 font-medium">Started At</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.sessionId')}</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.taskDescription')}</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.status')}</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.duration')}</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.commands')}</th>
+                <th className="py-2 px-3 font-medium">{t('replay.table.startedAt')}</th>
               </tr>
             </thead>
             <tbody>
@@ -438,7 +440,7 @@ export default function SessionReplayPage() {
                     colSpan={6}
                     className="py-8 text-center text-muted-foreground"
                   >
-                    No sessions found for the current filters.
+                    {t('replay.empty')}
                   </td>
                 </tr>
               )}
@@ -446,7 +448,7 @@ export default function SessionReplayPage() {
           </table>
           {total > 0 && (
             <div className="px-3 py-2 text-xs text-muted-foreground border-t bg-muted/30">
-              Showing {sessions.length} of {total} sessions
+              {t('replay.showing', { count: sessions.length, total })}
             </div>
           )}
         </div>
@@ -460,7 +462,7 @@ export default function SessionReplayPage() {
             <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
               <div>
                 <div className="flex items-center gap-3 mb-1">
-                  <h2 className="text-lg font-semibold">Session Replay</h2>
+                  <h2 className="text-lg font-semibold">{t('replay.panel.title')}</h2>
                   <span
                     className={cn(
                       'inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium capitalize',
@@ -473,20 +475,20 @@ export default function SessionReplayPage() {
                 </div>
                 <div className="flex flex-wrap gap-x-4 gap-y-1 text-xs text-muted-foreground">
                   <span>
-                    <span className="font-medium">ID:</span>{' '}
+                    <span className="font-medium">{t('replay.panel.id')}</span>{' '}
                     <span className="font-mono">{selectedSession.id}</span>
                   </span>
                   <span>
-                    <span className="font-medium">Duration:</span>{' '}
+                    <span className="font-medium">{t('replay.panel.duration')}</span>{' '}
                     {formatDuration(selectedSession.durationMs)}
                   </span>
                   <span>
-                    <span className="font-medium">Commands:</span>{' '}
+                    <span className="font-medium">{t('replay.panel.commands')}</span>{' '}
                     {selectedSession.commandCount}
                   </span>
                   {selectedSession.serverTargets.length > 0 && (
                     <span>
-                      <span className="font-medium">Servers:</span>{' '}
+                      <span className="font-medium">{t('replay.panel.servers')}</span>{' '}
                       {selectedSession.serverTargets.join(', ')}
                     </span>
                   )}
@@ -496,7 +498,7 @@ export default function SessionReplayPage() {
                 onClick={() => setSelectedSessionId(null)}
                 className="px-3 py-1.5 text-xs border rounded-md hover:bg-accent transition-colors self-start"
               >
-                Close
+                {t('replay.panel.close')}
               </button>
             </div>
 
@@ -513,14 +515,14 @@ export default function SessionReplayPage() {
                   disabled={events.length === 0}
                   className="px-3 py-1.5 text-xs font-medium rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
                 >
-                  Play
+                  {t('replay.playback.play')}
                 </button>
               ) : (
                 <button
                   onClick={handlePause}
                   className="px-3 py-1.5 text-xs font-medium rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
                 >
-                  Pause
+                  {t('replay.playback.pause')}
                 </button>
               )}
               <button
@@ -528,19 +530,19 @@ export default function SessionReplayPage() {
                 disabled={events.length === 0}
                 className="px-3 py-1.5 text-xs rounded-md border hover:bg-accent disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
               >
-                Reset
+                {t('replay.playback.reset')}
               </button>
               <button
                 onClick={handleShowAll}
                 disabled={events.length === 0}
                 className="px-3 py-1.5 text-xs rounded-md border hover:bg-accent disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
               >
-                Show All
+                {t('replay.playback.showAll')}
               </button>
             </div>
 
             <div className="flex items-center gap-2 ml-auto">
-              <span className="text-xs text-muted-foreground">Speed:</span>
+              <span className="text-xs text-muted-foreground">{t('replay.playback.speed')}</span>
               <div className="flex gap-1">
                 {PLAYBACK_SPEEDS.map((speed) => (
                   <button
@@ -559,8 +561,8 @@ export default function SessionReplayPage() {
               </div>
               <span className="text-xs text-muted-foreground ml-2">
                 {visibleEventIndex >= 0
-                  ? `${Math.min(visibleEventIndex + 1, events.length)} / ${events.length} events`
-                  : `${events.length} events`}
+                  ? t('replay.playback.eventsProgress', { current: Math.min(visibleEventIndex + 1, events.length), total: events.length })
+                  : `${events.length} ${t('replay.playback.events')}`}
               </span>
             </div>
           </div>
@@ -568,12 +570,12 @@ export default function SessionReplayPage() {
           {/* Events Loading / Error */}
           {eventsLoading && (
             <div className="p-4 text-muted-foreground text-sm">
-              Loading session events...
+              {t('replay.events.loading')}
             </div>
           )}
           {eventsError && (
             <div className="p-4 text-red-500 text-sm">
-              Error loading events: {(eventsError as Error).message}
+              {t('replay.events.loadError')} {(eventsError as Error).message}
             </div>
           )}
 
@@ -582,13 +584,13 @@ export default function SessionReplayPage() {
             <div className="p-4 max-h-[600px] overflow-y-auto">
               {visibleEvents.length === 0 && events.length === 0 && (
                 <p className="text-center text-muted-foreground py-8">
-                  No events recorded for this session.
+                  {t('replay.events.empty')}
                 </p>
               )}
 
               {visibleEvents.length === 0 && events.length > 0 && (
                 <p className="text-center text-muted-foreground py-8">
-                  Press Play to begin the session replay.
+                  {t('replay.events.pressPlay')}
                 </p>
               )}
 
@@ -625,6 +627,7 @@ function EventCard({
   isOutputExpanded: boolean;
   onToggleOutput: () => void;
 }) {
+  const { t } = useTranslation('audit');
   const relativeTime = useMemo(
     () => formatRelativeTime(event.timestamp, sessionStartedAt),
     [event.timestamp, sessionStartedAt],
@@ -643,7 +646,7 @@ function EventCard({
             EVENT_TYPE_STYLES[event.type] ?? 'bg-muted text-muted-foreground',
           )}
         >
-          {EVENT_TYPE_LABELS[event.type] ?? event.type}
+          {EVENT_TYPE_LABEL_KEYS[event.type] ? t(EVENT_TYPE_LABEL_KEYS[event.type]) : event.type}
         </span>
         {event.data.riskLevel && (
           <span
@@ -697,7 +700,7 @@ function EventCard({
               onClick={onToggleOutput}
               className="text-xs text-muted-foreground hover:text-foreground mt-1 underline transition-colors"
             >
-              {isOutputExpanded ? 'Collapse' : 'Expand full output'}
+              {isOutputExpanded ? t('replay.events.collapse') : t('replay.events.expandFullOutput')}
             </button>
           )}
         </div>
diff --git a/it0-web-admin/src/app/(admin)/communication/page.tsx b/it0-web-admin/src/app/(admin)/communication/page.tsx
index 3ffa926..aa778b1 100644
--- a/it0-web-admin/src/app/(admin)/communication/page.tsx
+++ b/it0-web-admin/src/app/(admin)/communication/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -50,70 +51,77 @@ interface PaginatedResponse<T> {
 
 // ── Channel config field definitions ────────────────────────────────────────
 
-const CHANNEL_CONFIG_FIELDS: Record<ChannelType, { key: string; label: string; type?: string }[]> = {
+const CHANNEL_CONFIG_FIELDS: Record<ChannelType, { key: string; labelKey: string; type?: string }[]> = {
   email: [
-    { key: 'smtpHost', label: 'SMTP Host' },
-    { key: 'smtpPort', label: 'SMTP Port' },
-    { key: 'smtpUser', label: 'SMTP Username' },
-    { key: 'smtpPass', label: 'SMTP Password', type: 'password' },
-    { key: 'fromAddress', label: 'From Address' },
+    { key: 'smtpHost', labelKey: 'channels.fields.smtpHost' },
+    { key: 'smtpPort', labelKey: 'channels.fields.smtpPort' },
+    { key: 'smtpUser', labelKey: 'channels.fields.username' },
+    { key: 'smtpPass', labelKey: 'channels.fields.password', type: 'password' },
+    { key: 'fromAddress', labelKey: 'channels.fields.fromAddress' },
   ],
   telegram: [
-    { key: 'botToken', label: 'Bot Token', type: 'password' },
-    { key: 'chatId', label: 'Chat ID' },
+    { key: 'botToken', labelKey: 'channels.fields.botToken', type: 'password' },
+    { key: 'chatId', labelKey: 'channels.fields.chatId' },
   ],
   sms: [
-    { key: 'provider', label: 'Provider' },
-    { key: 'apiKey', label: 'API Key', type: 'password' },
-    { key: 'fromNumber', label: 'From Number' },
+    { key: 'provider', labelKey: 'channels.fields.provider' },
+    { key: 'apiKey', labelKey: 'channels.fields.apiKey', type: 'password' },
+    { key: 'fromNumber', labelKey: 'channels.fields.fromNumber' },
   ],
   push: [
-    { key: 'provider', label: 'Provider' },
-    { key: 'apiKey', label: 'API Key', type: 'password' },
-    { key: 'appId', label: 'App ID' },
+    { key: 'provider', labelKey: 'channels.fields.provider' },
+    { key: 'apiKey', labelKey: 'channels.fields.apiKey', type: 'password' },
+    { key: 'appId', labelKey: 'channels.fields.appId' },
   ],
   voice_call: [
-    { key: 'provider', label: 'Provider' },
-    { key: 'apiKey', label: 'API Key', type: 'password' },
-    { key: 'fromNumber', label: 'From Number' },
+    { key: 'provider', labelKey: 'channels.fields.provider' },
+    { key: 'apiKey', labelKey: 'channels.fields.apiKey', type: 'password' },
+    { key: 'fromNumber', labelKey: 'channels.fields.fromNumber' },
   ],
   wechat_work: [
-    { key: 'corpId', label: 'Corp ID' },
-    { key: 'agentId', label: 'Agent ID' },
-    { key: 'secret', label: 'Secret', type: 'password' },
+    { key: 'corpId', labelKey: 'channels.fields.corpId' },
+    { key: 'agentId', labelKey: 'channels.fields.agentId' },
+    { key: 'secret', labelKey: 'channels.fields.secret', type: 'password' },
   ],
   voice_service: [
-    { key: 'provider', label: 'Provider' },
-    { key: 'apiKey', label: 'API Key', type: 'password' },
-    { key: 'endpoint', label: 'Endpoint URL' },
+    { key: 'provider', labelKey: 'channels.fields.provider' },
+    { key: 'apiKey', labelKey: 'channels.fields.apiKey', type: 'password' },
+    { key: 'endpoint', labelKey: 'channels.fields.endpoint' },
   ],
 };
 
 const ALL_CHANNEL_TYPES: ChannelType[] = ['push', 'sms', 'voice_call', 'email', 'telegram', 'wechat_work', 'voice_service'];
 
-const CHANNEL_LABELS: Record<ChannelType, string> = {
-  push: 'Push Notification',
-  sms: 'SMS',
-  voice_call: 'Voice Call',
-  email: 'Email',
-  telegram: 'Telegram',
-  wechat_work: 'WeChat Work',
-  voice_service: 'Voice Service',
+const CHANNEL_LABEL_KEYS: Record<ChannelType, string> = {
+  push: 'channels.types.push',
+  sms: 'channels.types.sms',
+  voice_call: 'channels.types.voice',
+  email: 'channels.types.email',
+  telegram: 'channels.types.telegram',
+  wechat_work: 'channels.types.wechatWork',
+  voice_service: 'channels.types.voiceService',
 };
 
 const SEVERITY_OPTIONS = ['critical', 'high', 'medium', 'low', 'info'];
 
-const TABS = ['Channels', 'Contacts', 'Escalation Policies'] as const;
+const TABS = ['channels', 'contacts', 'escalationPolicies'] as const;
 type Tab = (typeof TABS)[number];
 
+const TAB_LABEL_KEYS: Record<Tab, string> = {
+  channels: 'tabs.channels',
+  contacts: 'tabs.contacts',
+  escalationPolicies: 'tabs.escalationPolicies',
+};
+
 // ── Main Component ──────────────────────────────────────────────────────────
 
 export default function CommunicationPage() {
-  const [activeTab, setActiveTab] = useState<Tab>('Channels');
+  const { t } = useTranslation('communication');
+  const [activeTab, setActiveTab] = useState<Tab>('channels');
 
   return (
     <div>
-      <h1 className="text-2xl font-bold mb-6">Communication Settings</h1>
+      <h1 className="text-2xl font-bold mb-6">{t('title')}</h1>
       {/* Tab bar */}
       <div className="flex border-b mb-6">
         {TABS.map((tab) => (
@@ -127,14 +135,14 @@ export default function CommunicationPage() {
                 : 'border-transparent text-muted-foreground hover:text-foreground hover:border-muted-foreground/30'
             )}
           >
-            {tab}
+            {t(TAB_LABEL_KEYS[tab])}
           </button>
         ))}
       </div>
       {/* Tab content */}
-      {activeTab === 'Channels' && <ChannelsTab />}
-      {activeTab === 'Contacts' && <ContactsTab />}
-      {activeTab === 'Escalation Policies' && <EscalationPoliciesTab />}
+      {activeTab === 'channels' && <ChannelsTab />}
+      {activeTab === 'contacts' && <ContactsTab />}
+      {activeTab === 'escalationPolicies' && <EscalationPoliciesTab />}
     </div>
   );
 }
@@ -142,6 +150,8 @@ export default function CommunicationPage() {
 // ── Tab 1: Channels ─────────────────────────────────────────────────────────
 
 function ChannelsTab() {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
   const [expandedId, setExpandedId] = useState<string | null>(null);
 
@@ -170,19 +180,19 @@ function ChannelsTab() {
 
   const channels = data?.data ?? [];
 
-  if (isLoading) return <p className="text-muted-foreground">Loading channels...</p>;
-  if (error) return <p className="text-red-500">Error loading channels: {(error as Error).message}</p>;
+  if (isLoading) return <p className="text-muted-foreground">{tc('loading')}</p>;
+  if (error) return <p className="text-red-500">{tc('error')}: {(error as Error).message}</p>;
 
   return (
     <div className="space-y-3">
-      {channels.length === 0 && <p className="text-muted-foreground">No channels configured.</p>}
+      {channels.length === 0 && <p className="text-muted-foreground">{tc('noData')}</p>}
       {channels.map((ch) => (
         <div key={ch.id} className="border rounded-lg bg-card">
           <div className="flex items-center justify-between p-4">
             <div className="flex items-center gap-4">
               <div>
                 <p className="font-medium">{ch.name}</p>
-                <p className="text-xs text-muted-foreground">{CHANNEL_LABELS[ch.type] ?? ch.type}</p>
+                <p className="text-xs text-muted-foreground">{CHANNEL_LABEL_KEYS[ch.type] ? t(CHANNEL_LABEL_KEYS[ch.type]) : ch.type}</p>
               </div>
               <span
                 className={cn(
@@ -190,7 +200,7 @@ function ChannelsTab() {
                   ch.configured ? 'bg-green-100 text-green-700' : 'bg-yellow-100 text-yellow-700'
                 )}
               >
-                {ch.configured ? 'Configured' : 'Not Configured'}
+                {ch.configured ? t('channels.configured') : t('channels.notConfigured')}
               </span>
             </div>
             <div className="flex items-center gap-3">
@@ -202,7 +212,7 @@ function ChannelsTab() {
                   'relative inline-flex h-6 w-11 items-center rounded-full transition-colors',
                   ch.enabled ? 'bg-primary' : 'bg-muted'
                 )}
-                title={ch.enabled ? 'Disable channel' : 'Enable channel'}
+                title={ch.enabled ? tc('disabled') : tc('enabled')}
               >
                 <span
                   className={cn(
@@ -215,7 +225,7 @@ function ChannelsTab() {
                 onClick={() => setExpandedId(expandedId === ch.id ? null : ch.id)}
                 className="text-sm text-primary hover:underline"
               >
-                {expandedId === ch.id ? 'Hide Config' : 'Show Config'}
+                {expandedId === ch.id ? t('channels.hideConfig') : t('channels.showConfig')}
               </button>
             </div>
           </div>
@@ -242,6 +252,8 @@ function ChannelConfigEditor({
   onSave: (config: Record<string, string>) => void;
   isSaving: boolean;
 }) {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const fields = CHANNEL_CONFIG_FIELDS[channel.type] ?? [];
   const [localConfig, setLocalConfig] = useState<Record<string, string>>({ ...channel.config });
 
@@ -249,7 +261,7 @@ function ChannelConfigEditor({
     <div className="border-t p-4 space-y-3">
       {fields.map((field) => (
         <div key={field.key}>
-          <label className="block text-sm font-medium mb-1">{field.label}</label>
+          <label className="block text-sm font-medium mb-1">{t(field.labelKey)}</label>
           <input
             type={field.type ?? 'text'}
             value={localConfig[field.key] ?? ''}
@@ -263,7 +275,7 @@ function ChannelConfigEditor({
         disabled={isSaving}
         className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm hover:opacity-90 disabled:opacity-50"
       >
-        {isSaving ? 'Saving...' : 'Save Configuration'}
+        {isSaving ? tc('saving') : t('channels.saveConfiguration')}
       </button>
     </div>
   );
@@ -272,6 +284,8 @@ function ChannelConfigEditor({
 // ── Tab 2: Contacts ─────────────────────────────────────────────────────────
 
 function ContactsTab() {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
   const [showDialog, setShowDialog] = useState(false);
   const [editingContact, setEditingContact] = useState<Contact | null>(null);
@@ -321,29 +335,29 @@ function ContactsTab() {
   return (
     <div>
       <div className="flex justify-between items-center mb-4">
-        <p className="text-sm text-muted-foreground">{contacts.length} contact(s)</p>
+        <p className="text-sm text-muted-foreground">{t('contacts.count', { count: contacts.length })}</p>
         <button
           onClick={handleOpenAdd}
           className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm"
         >
-          Add Contact
+          {t('contacts.addContact')}
         </button>
       </div>
 
-      {isLoading && <p className="text-muted-foreground">Loading contacts...</p>}
-      {error && <p className="text-red-500">Error: {(error as Error).message}</p>}
+      {isLoading && <p className="text-muted-foreground">{tc('loading')}</p>}
+      {error && <p className="text-red-500">{tc('error')}: {(error as Error).message}</p>}
 
       {!isLoading && !error && (
         <div className="overflow-x-auto">
           <table className="w-full text-sm">
             <thead>
               <tr className="border-b text-left">
-                <th className="py-2 pr-4 font-medium">Name</th>
-                <th className="py-2 pr-4 font-medium">Email</th>
-                <th className="py-2 pr-4 font-medium">Phone</th>
-                <th className="py-2 pr-4 font-medium">Role</th>
-                <th className="py-2 pr-4 font-medium">Channels</th>
-                <th className="py-2 font-medium">Actions</th>
+                <th className="py-2 pr-4 font-medium">{t('contacts.table.name')}</th>
+                <th className="py-2 pr-4 font-medium">{t('contacts.table.email')}</th>
+                <th className="py-2 pr-4 font-medium">{t('contacts.table.phone')}</th>
+                <th className="py-2 pr-4 font-medium">{t('contacts.table.role')}</th>
+                <th className="py-2 pr-4 font-medium">{t('contacts.table.channels')}</th>
+                <th className="py-2 font-medium">{t('contacts.table.actions')}</th>
               </tr>
             </thead>
             <tbody>
@@ -370,16 +384,16 @@ function ContactsTab() {
                         onClick={() => handleOpenEdit(c)}
                         className="text-xs text-primary hover:underline"
                       >
-                        Edit
+                        {tc('edit')}
                       </button>
                       <button
                         onClick={() => {
-                          if (confirm('Delete this contact?')) deleteMutation.mutate(c.id);
+                          if (confirm(tc('confirmDelete'))) deleteMutation.mutate(c.id);
                         }}
                         className="text-xs text-red-500 hover:underline"
                         disabled={deleteMutation.isPending}
                       >
-                        Delete
+                        {tc('delete')}
                       </button>
                     </div>
                   </td>
@@ -388,7 +402,7 @@ function ContactsTab() {
               {contacts.length === 0 && (
                 <tr>
                   <td colSpan={6} className="py-8 text-center text-muted-foreground">
-                    No contacts found. Click &quot;Add Contact&quot; to create one.
+                    {t('contacts.empty')}
                   </td>
                 </tr>
               )}
@@ -430,6 +444,8 @@ function ContactDialog({
   onSave: (data: Omit<Contact, 'id'>) => void;
   isSaving: boolean;
 }) {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const [name, setName] = useState(contact?.name ?? '');
   const [email, setEmail] = useState(contact?.email ?? '');
   const [phone, setPhone] = useState(contact?.phone ?? '');
@@ -448,26 +464,26 @@ function ContactDialog({
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50">
       <div className="bg-card border rounded-lg shadow-lg w-full max-w-lg p-6">
-        <h2 className="text-lg font-semibold mb-4">{contact ? 'Edit Contact' : 'Add Contact'}</h2>
+        <h2 className="text-lg font-semibold mb-4">{contact ? t('contacts.editContact') : t('contacts.addContact')}</h2>
         <form onSubmit={handleSubmit} className="space-y-3">
           <div>
-            <label className="block text-sm font-medium mb-1">Name</label>
+            <label className="block text-sm font-medium mb-1">{t('contacts.form.name')}</label>
             <input value={name} onChange={(e) => setName(e.target.value)} required className="w-full px-3 py-2 bg-input border rounded-md text-sm" />
           </div>
           <div>
-            <label className="block text-sm font-medium mb-1">Email</label>
+            <label className="block text-sm font-medium mb-1">{t('contacts.form.email')}</label>
             <input type="email" value={email} onChange={(e) => setEmail(e.target.value)} required className="w-full px-3 py-2 bg-input border rounded-md text-sm" />
           </div>
           <div>
-            <label className="block text-sm font-medium mb-1">Phone</label>
+            <label className="block text-sm font-medium mb-1">{t('contacts.form.phone')}</label>
             <input value={phone} onChange={(e) => setPhone(e.target.value)} className="w-full px-3 py-2 bg-input border rounded-md text-sm" />
           </div>
           <div>
-            <label className="block text-sm font-medium mb-1">Role</label>
+            <label className="block text-sm font-medium mb-1">{t('contacts.form.role')}</label>
             <input value={role} onChange={(e) => setRole(e.target.value)} required className="w-full px-3 py-2 bg-input border rounded-md text-sm" placeholder="e.g. admin, on-call, manager" />
           </div>
           <div>
-            <label className="block text-sm font-medium mb-1">Channels</label>
+            <label className="block text-sm font-medium mb-1">{t('contacts.form.channels')}</label>
             <div className="flex flex-wrap gap-2">
               {ALL_CHANNEL_TYPES.map((ch) => (
                 <button
@@ -486,10 +502,10 @@ function ContactDialog({
           </div>
           <div className="flex justify-end gap-2 pt-2">
             <button type="button" onClick={onClose} className="px-4 py-2 border rounded-md text-sm hover:bg-accent">
-              Cancel
+              {tc('cancel')}
             </button>
             <button type="submit" disabled={isSaving} className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm hover:opacity-90 disabled:opacity-50">
-              {isSaving ? 'Saving...' : contact ? 'Update' : 'Create'}
+              {isSaving ? tc('saving') : contact ? tc('save') : tc('create')}
             </button>
           </div>
         </form>
@@ -501,6 +517,8 @@ function ContactDialog({
 // ── Tab 3: Escalation Policies ──────────────────────────────────────────────
 
 function EscalationPoliciesTab() {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
   const [showDialog, setShowDialog] = useState(false);
   const [expandedId, setExpandedId] = useState<string | null>(null);
@@ -543,14 +561,14 @@ function EscalationPoliciesTab() {
   return (
     <div>
       <div className="flex justify-between items-center mb-4">
-        <p className="text-sm text-muted-foreground">{policies.length} policy(ies)</p>
+        <p className="text-sm text-muted-foreground">{t('escalationPolicies.count', { count: policies.length })}</p>
         <button onClick={() => setShowDialog(true)} className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm">
-          Add Policy
+          {t('escalationPolicies.addPolicy')}
         </button>
       </div>
 
-      {isLoading && <p className="text-muted-foreground">Loading policies...</p>}
-      {error && <p className="text-red-500">Error: {(error as Error).message}</p>}
+      {isLoading && <p className="text-muted-foreground">{tc('loading')}</p>}
+      {error && <p className="text-red-500">{tc('error')}: {(error as Error).message}</p>}
 
       <div className="space-y-3">
         {policies.map((policy) => (
@@ -559,10 +577,10 @@ function EscalationPoliciesTab() {
               <div className="flex items-center gap-3">
                 <div>
                   <p className="font-medium">{policy.name}</p>
-                  <p className="text-xs text-muted-foreground">Severity: {policy.severity}</p>
+                  <p className="text-xs text-muted-foreground">{tc('severity')}: {policy.severity}</p>
                 </div>
                 {policy.isDefault && (
-                  <span className="text-xs px-2 py-0.5 rounded-full bg-blue-100 text-blue-700">Default</span>
+                  <span className="text-xs px-2 py-0.5 rounded-full bg-blue-100 text-blue-700">{t('escalationPolicies.default')}</span>
                 )}
               </div>
               <div className="flex items-center gap-2">
@@ -570,16 +588,16 @@ function EscalationPoliciesTab() {
                   onClick={() => setExpandedId(expandedId === policy.id ? null : policy.id)}
                   className="text-sm text-primary hover:underline"
                 >
-                  {expandedId === policy.id ? 'Collapse' : 'Edit Steps'}
+                  {expandedId === policy.id ? t('escalationPolicies.collapseSteps') : t('escalationPolicies.editSteps')}
                 </button>
                 <button
                   onClick={() => {
-                    if (confirm('Delete this escalation policy?')) deleteMutation.mutate(policy.id);
+                    if (confirm(tc('confirmDelete'))) deleteMutation.mutate(policy.id);
                   }}
                   className="text-sm text-red-500 hover:underline"
                   disabled={deleteMutation.isPending}
                 >
-                  Delete
+                  {tc('delete')}
                 </button>
               </div>
             </div>
@@ -594,7 +612,7 @@ function EscalationPoliciesTab() {
           </div>
         ))}
         {!isLoading && policies.length === 0 && (
-          <p className="text-center text-muted-foreground py-8">No escalation policies. Click &quot;Add Policy&quot; to create one.</p>
+          <p className="text-center text-muted-foreground py-8">{t('escalationPolicies.empty')}</p>
         )}
       </div>
 
@@ -621,6 +639,8 @@ function PolicyStepEditor({
   onSave: (policy: EscalationPolicy) => void;
   isSaving: boolean;
 }) {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const [steps, setSteps] = useState<EscalationStep[]>(policy.steps);
 
   const addStep = () => {
@@ -665,17 +685,17 @@ function PolicyStepEditor({
 
   return (
     <div className="border-t p-4 space-y-4">
-      <p className="text-sm font-medium">Escalation Steps</p>
+      <p className="text-sm font-medium">{t('escalationPolicies.form.steps')}</p>
       {steps.map((step, idx) => (
         <div key={idx} className="border rounded-md p-3 space-y-2 bg-background">
           <div className="flex items-center justify-between">
-            <span className="text-sm font-medium">Step {step.stepNumber}</span>
+            <span className="text-sm font-medium">{t('escalationPolicies.step.title', { number: step.stepNumber })}</span>
             <button onClick={() => removeStep(idx)} className="text-xs text-red-500 hover:underline">
-              Remove
+              {tc('remove')}
             </button>
           </div>
           <div>
-            <label className="block text-xs text-muted-foreground mb-1">Delay (minutes)</label>
+            <label className="block text-xs text-muted-foreground mb-1">{t('escalationPolicies.step.delay')} ({t('escalationPolicies.step.delayMinutes')})</label>
             <input
               type="number"
               min={0}
@@ -685,7 +705,7 @@ function PolicyStepEditor({
             />
           </div>
           <div>
-            <label className="block text-xs text-muted-foreground mb-1">Channels</label>
+            <label className="block text-xs text-muted-foreground mb-1">{t('escalationPolicies.step.channels')}</label>
             <div className="flex flex-wrap gap-1">
               {ALL_CHANNEL_TYPES.map((ch) => (
                 <button
@@ -703,9 +723,9 @@ function PolicyStepEditor({
             </div>
           </div>
           <div>
-            <label className="block text-xs text-muted-foreground mb-1">Contacts</label>
+            <label className="block text-xs text-muted-foreground mb-1">{t('escalationPolicies.step.contacts')}</label>
             {contacts.length === 0 ? (
-              <p className="text-xs text-muted-foreground">No contacts available. Add contacts first.</p>
+              <p className="text-xs text-muted-foreground">{t('contacts.empty')}</p>
             ) : (
               <div className="flex flex-wrap gap-1">
                 {contacts.map((c) => (
@@ -728,14 +748,14 @@ function PolicyStepEditor({
       ))}
       <div className="flex gap-2">
         <button onClick={addStep} className="px-3 py-1.5 border rounded-md text-sm hover:bg-accent">
-          + Add Step
+          + {t('escalationPolicies.step.addStep')}
         </button>
         <button
           onClick={() => onSave({ ...policy, steps })}
           disabled={isSaving}
           className="px-4 py-1.5 bg-primary text-primary-foreground rounded-md text-sm hover:opacity-90 disabled:opacity-50"
         >
-          {isSaving ? 'Saving...' : 'Save Steps'}
+          {isSaving ? tc('saving') : tc('save')}
         </button>
       </div>
     </div>
@@ -751,6 +771,8 @@ function PolicyDialog({
   onSave: (data: Omit<EscalationPolicy, 'id'>) => void;
   isSaving: boolean;
 }) {
+  const { t } = useTranslation('communication');
+  const { t: tc } = useTranslation('common');
   const [name, setName] = useState('');
   const [severity, setSeverity] = useState('critical');
   const [isDefault, setIsDefault] = useState(false);
@@ -763,14 +785,14 @@ function PolicyDialog({
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50">
       <div className="bg-card border rounded-lg shadow-lg w-full max-w-md p-6">
-        <h2 className="text-lg font-semibold mb-4">Add Escalation Policy</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('escalationPolicies.addPolicy')}</h2>
         <form onSubmit={handleSubmit} className="space-y-3">
           <div>
-            <label className="block text-sm font-medium mb-1">Name</label>
+            <label className="block text-sm font-medium mb-1">{t('escalationPolicies.form.name')}</label>
             <input value={name} onChange={(e) => setName(e.target.value)} required className="w-full px-3 py-2 bg-input border rounded-md text-sm" placeholder="e.g. Critical Alert Policy" />
           </div>
           <div>
-            <label className="block text-sm font-medium mb-1">Severity</label>
+            <label className="block text-sm font-medium mb-1">{t('escalationPolicies.form.severity')}</label>
             <select value={severity} onChange={(e) => setSeverity(e.target.value)} className="w-full px-3 py-2 bg-input border rounded-md text-sm">
               {SEVERITY_OPTIONS.map((s) => (
                 <option key={s} value={s}>{s}</option>
@@ -779,14 +801,14 @@ function PolicyDialog({
           </div>
           <div className="flex items-center gap-2">
             <input type="checkbox" id="isDefault" checked={isDefault} onChange={(e) => setIsDefault(e.target.checked)} className="rounded" />
-            <label htmlFor="isDefault" className="text-sm">Set as default policy</label>
+            <label htmlFor="isDefault" className="text-sm">{t('escalationPolicies.form.setAsDefault')}</label>
           </div>
           <div className="flex justify-end gap-2 pt-2">
             <button type="button" onClick={onClose} className="px-4 py-2 border rounded-md text-sm hover:bg-accent">
-              Cancel
+              {tc('cancel')}
             </button>
             <button type="submit" disabled={isSaving} className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm hover:opacity-90 disabled:opacity-50">
-              {isSaving ? 'Creating...' : 'Create Policy'}
+              {isSaving ? tc('creating') : tc('create')}
             </button>
           </div>
         </form>
diff --git a/it0-web-admin/src/app/(admin)/dashboard/page.tsx b/it0-web-admin/src/app/(admin)/dashboard/page.tsx
index c6d0883..751c174 100644
--- a/it0-web-admin/src/app/(admin)/dashboard/page.tsx
+++ b/it0-web-admin/src/app/(admin)/dashboard/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useQuery } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { formatDistanceToNow } from 'date-fns';
@@ -112,6 +113,9 @@ function StatCard({ label, count, icon, loading }: StatCardProps) {
 /* ---------- page ---------- */
 
 export default function DashboardPage() {
+  const { t } = useTranslation('dashboard');
+  const { t: tc } = useTranslation('common');
+
   const {
     data: serversRaw,
     isLoading: serversLoading,
@@ -154,30 +158,30 @@ export default function DashboardPage() {
 
   return (
     <div>
-      <h1 className="text-2xl font-bold mb-6">Dashboard</h1>
+      <h1 className="text-2xl font-bold mb-6">{t('title')}</h1>
 
       {/* ---- stat cards ---- */}
       <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-4 mb-8">
         <StatCard
-          label="Total Servers"
+          label={t('stats.totalServers')}
           count={serversData?.total}
           icon={<Server className="h-5 w-5" />}
           loading={serversLoading}
         />
         <StatCard
-          label="Active Alerts"
+          label={t('stats.activeAlerts')}
           count={alertsData?.total}
           icon={<AlertTriangle className="h-5 w-5" />}
           loading={alertsLoading}
         />
         <StatCard
-          label="Running Tasks"
+          label={t('stats.runningTasks')}
           count={tasksData?.total}
           icon={<ListTodo className="h-5 w-5" />}
           loading={tasksLoading}
         />
         <StatCard
-          label="Standing Orders"
+          label={t('stats.standingOrders')}
           count={standingOrdersData?.total}
           icon={<Clock className="h-5 w-5" />}
           loading={ordersLoading}
@@ -186,20 +190,20 @@ export default function DashboardPage() {
 
       {/* ---- recent alerts ---- */}
       <div className="bg-card rounded-lg border p-4 mb-6">
-        <h2 className="text-lg font-semibold mb-3">Recent Alerts</h2>
+        <h2 className="text-lg font-semibold mb-3">{t('recentAlerts.title')}</h2>
         {alertsLoading ? (
-          <p className="text-sm text-muted-foreground">Loading...</p>
+          <p className="text-sm text-muted-foreground">{tc('loading')}</p>
         ) : recentAlerts.length === 0 ? (
-          <p className="text-sm text-muted-foreground">No recent alerts.</p>
+          <p className="text-sm text-muted-foreground">{t('recentAlerts.empty')}</p>
         ) : (
           <div className="overflow-x-auto">
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b text-left text-muted-foreground">
-                  <th className="pb-2 pr-4 font-medium">Severity</th>
-                  <th className="pb-2 pr-4 font-medium">Message</th>
-                  <th className="pb-2 pr-4 font-medium">Server</th>
-                  <th className="pb-2 font-medium">Time</th>
+                  <th className="pb-2 pr-4 font-medium">{t('recentAlerts.severity')}</th>
+                  <th className="pb-2 pr-4 font-medium">{t('recentAlerts.message')}</th>
+                  <th className="pb-2 pr-4 font-medium">{t('recentAlerts.server')}</th>
+                  <th className="pb-2 font-medium">{t('recentAlerts.time')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -225,19 +229,19 @@ export default function DashboardPage() {
 
       {/* ---- recent tasks ---- */}
       <div className="bg-card rounded-lg border p-4">
-        <h2 className="text-lg font-semibold mb-3">Recent Tasks</h2>
+        <h2 className="text-lg font-semibold mb-3">{t('recentTasks.title')}</h2>
         {tasksLoading ? (
-          <p className="text-sm text-muted-foreground">Loading...</p>
+          <p className="text-sm text-muted-foreground">{tc('loading')}</p>
         ) : recentTasks.length === 0 ? (
-          <p className="text-sm text-muted-foreground">No recent tasks.</p>
+          <p className="text-sm text-muted-foreground">{t('recentTasks.empty')}</p>
         ) : (
           <div className="overflow-x-auto">
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b text-left text-muted-foreground">
-                  <th className="pb-2 pr-4 font-medium">Name</th>
-                  <th className="pb-2 pr-4 font-medium">Status</th>
-                  <th className="pb-2 font-medium">Created</th>
+                  <th className="pb-2 pr-4 font-medium">{t('recentTasks.name')}</th>
+                  <th className="pb-2 pr-4 font-medium">{t('recentTasks.status')}</th>
+                  <th className="pb-2 font-medium">{t('recentTasks.created')}</th>
                 </tr>
               </thead>
               <tbody>
diff --git a/it0-web-admin/src/app/(admin)/monitoring/alert-rules/[id]/page.tsx b/it0-web-admin/src/app/(admin)/monitoring/alert-rules/[id]/page.tsx
index 965a162..0295019 100644
--- a/it0-web-admin/src/app/(admin)/monitoring/alert-rules/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/monitoring/alert-rules/[id]/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
 import { apiClient } from '@/infrastructure/api/api-client';
@@ -69,19 +70,19 @@ const SEVERITY_STYLES: Record<Severity, string> = {
   fatal: 'bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400',
 };
 
-const CONDITIONS: { label: string; value: Condition }[] = [
-  { label: '> (greater than)', value: '>' },
-  { label: '< (less than)', value: '<' },
-  { label: '== (equal)', value: '==' },
-  { label: '>= (greater or equal)', value: '>=' },
-  { label: '<= (less or equal)', value: '<=' },
+const CONDITIONS: { labelKey: string; value: Condition }[] = [
+  { labelKey: 'alertRules.conditions.greaterThan', value: '>' },
+  { labelKey: 'alertRules.conditions.lessThan', value: '<' },
+  { labelKey: 'alertRules.conditions.equal', value: '==' },
+  { labelKey: 'alertRules.conditions.greaterOrEqual', value: '>=' },
+  { labelKey: 'alertRules.conditions.lessOrEqual', value: '<=' },
 ];
 
-const SEVERITIES: { label: string; value: Severity }[] = [
-  { label: 'Info', value: 'info' },
-  { label: 'Warning', value: 'warning' },
-  { label: 'Critical', value: 'critical' },
-  { label: 'Fatal', value: 'fatal' },
+const SEVERITIES: { labelKey: string; value: Severity }[] = [
+  { labelKey: 'alertRules.severities.info', value: 'info' },
+  { labelKey: 'alertRules.severities.warning', value: 'warning' },
+  { labelKey: 'alertRules.severities.critical', value: 'critical' },
+  { labelKey: 'alertRules.severities.fatal', value: 'fatal' },
 ];
 
 const COMMON_METRICS = [
@@ -171,16 +172,17 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('monitoring');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Alert Rule</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('alertRules.deleteRule')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{name}</strong>? This will stop all future
-          alerts for this rule and cannot be undone.
+          {t('alertRules.deleteConfirm')} <strong>{name}</strong>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -188,14 +190,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -249,6 +251,8 @@ function InfoRow({ label, value }: { label: string; value: React.ReactNode }) {
 // ---------------------------------------------------------------------------
 
 export default function AlertRuleDetailPage() {
+  const { t } = useTranslation('monitoring');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
@@ -423,10 +427,10 @@ export default function AlertRuleDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Alert Rules
+          {t('alertRules.detail.backToAlertRules')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading alert rule...
+          {t('alertRules.detail.loading')}
         </div>
       </div>
     );
@@ -454,10 +458,10 @@ export default function AlertRuleDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Alert Rules
+          {t('alertRules.detail.backToAlertRules')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load alert rule: {(error as Error).message}
+          {t('alertRules.detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -486,7 +490,7 @@ export default function AlertRuleDetailPage() {
           <path d="M19 12H5" />
           <path d="m12 19-7-7 7-7" />
         </svg>
-        Back to Alert Rules
+        {t('alertRules.detail.backToAlertRules')}
       </button>
 
       {/* Page header */}
@@ -502,7 +506,7 @@ export default function AlertRuleDetailPage() {
                 : 'bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300',
             )}
           >
-            {rule.enabled ? 'Enabled' : 'Disabled'}
+            {rule.enabled ? tc('enabled') : tc('disabled')}
           </span>
         </div>
         <div className="flex items-center gap-2">
@@ -529,13 +533,13 @@ export default function AlertRuleDetailPage() {
           {/* Alert Rule Information Card */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Rule Configuration</h2>
+              <h2 className="text-lg font-semibold">{t('alertRules.detail.ruleConfiguration')}</h2>
               {!isEditing && (
                 <button
                   onClick={startEditing}
                   className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                 >
-                  Edit
+                  {tc('edit')}
                 </button>
               )}
             </div>
@@ -546,7 +550,7 @@ export default function AlertRuleDetailPage() {
                 {/* name */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Name <span className="text-destructive">*</span>
+                    {t('alertRules.form.name')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -565,7 +569,7 @@ export default function AlertRuleDetailPage() {
 
                 {/* description */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Description</label>
+                  <label className="block text-sm font-medium mb-1">{t('alertRules.form.description')}</label>
                   <textarea
                     value={form.description}
                     onChange={(e) => handleChange('description', e.target.value)}
@@ -578,7 +582,7 @@ export default function AlertRuleDetailPage() {
                 {/* metric */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Metric <span className="text-destructive">*</span>
+                    {t('alertRules.form.metric')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -604,7 +608,7 @@ export default function AlertRuleDetailPage() {
                 {/* condition + threshold */}
                 <div className="grid grid-cols-2 gap-4">
                   <div>
-                    <label className="block text-sm font-medium mb-1">Condition</label>
+                    <label className="block text-sm font-medium mb-1">{t('alertRules.form.condition')}</label>
                     <select
                       value={form.condition}
                       onChange={(e) => handleChange('condition', e.target.value)}
@@ -612,14 +616,14 @@ export default function AlertRuleDetailPage() {
                     >
                       {CONDITIONS.map((c) => (
                         <option key={c.value} value={c.value}>
-                          {c.label}
+                          {t(c.labelKey)}
                         </option>
                       ))}
                     </select>
                   </div>
                   <div>
                     <label className="block text-sm font-medium mb-1">
-                      Threshold <span className="text-destructive">*</span>
+                      {t('alertRules.form.threshold')} <span className="text-destructive">*</span>
                     </label>
                     <input
                       type="number"
@@ -640,7 +644,7 @@ export default function AlertRuleDetailPage() {
 
                 {/* severity */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Severity</label>
+                  <label className="block text-sm font-medium mb-1">{t('alertRules.form.severity')}</label>
                   <select
                     value={form.severity}
                     onChange={(e) => handleChange('severity', e.target.value)}
@@ -648,7 +652,7 @@ export default function AlertRuleDetailPage() {
                   >
                     {SEVERITIES.map((s) => (
                       <option key={s.value} value={s.value}>
-                        {s.label}
+                        {t(s.labelKey)}
                       </option>
                     ))}
                   </select>
@@ -656,20 +660,20 @@ export default function AlertRuleDetailPage() {
 
                 {/* notifyChannels */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Notify Channels</label>
+                  <label className="block text-sm font-medium mb-1">{t('alertRules.form.notifyChannels')}</label>
                   <input
                     type="text"
                     value={form.notifyChannels}
                     onChange={(e) => handleChange('notifyChannels', e.target.value)}
                     className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-                    placeholder="email, slack, webhook (comma-separated)"
+                    placeholder={t('alertRules.form.notifyChannelsPlaceholder')}
                   />
                 </div>
 
                 {/* cooldownMinutes */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Cooldown (minutes) <span className="text-destructive">*</span>
+                    {t('alertRules.form.cooldownMinutes')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="number"
@@ -690,7 +694,7 @@ export default function AlertRuleDetailPage() {
                 {/* Update error */}
                 {updateMutation.isError && (
                   <div className="p-3 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-                    Failed to update rule: {(updateMutation.error as Error).message}
+                    {t('alertRules.detail.failedToUpdate')} {(updateMutation.error as Error).message}
                   </div>
                 )}
 
@@ -702,7 +706,7 @@ export default function AlertRuleDetailPage() {
                     className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
                     disabled={updateMutation.isPending}
                   >
-                    Cancel
+                    {tc('cancel')}
                   </button>
                   <button
                     type="button"
@@ -710,20 +714,20 @@ export default function AlertRuleDetailPage() {
                     disabled={updateMutation.isPending}
                     className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
                   >
-                    {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                    {updateMutation.isPending ? tc('saving') : tc('save')}
                   </button>
                 </div>
               </div>
             ) : (
               /* ---------- Read-only info display ---------- */
               <dl className="divide-y">
-                <InfoRow label="Name" value={rule.name} />
+                <InfoRow label={t('alertRules.form.name')} value={rule.name} />
                 <InfoRow
-                  label="Description"
-                  value={rule.description || 'No description'}
+                  label={t('alertRules.form.description')}
+                  value={rule.description || t('alertRules.detail.noDescription')}
                 />
                 <InfoRow
-                  label="Metric"
+                  label={t('alertRules.form.metric')}
                   value={
                     <code className="font-mono text-xs bg-muted px-1.5 py-0.5 rounded">
                       {rule.metric}
@@ -731,7 +735,7 @@ export default function AlertRuleDetailPage() {
                   }
                 />
                 <InfoRow
-                  label="Condition"
+                  label={t('alertRules.form.condition')}
                   value={
                     <span className="font-mono text-sm">
                       {rule.metric} {rule.condition} {rule.threshold}
@@ -739,17 +743,17 @@ export default function AlertRuleDetailPage() {
                   }
                 />
                 <InfoRow
-                  label="Threshold"
+                  label={t('alertRules.form.threshold')}
                   value={
                     <span className="tabular-nums">{rule.threshold}</span>
                   }
                 />
                 <InfoRow
-                  label="Severity"
+                  label={tc('severity')}
                   value={<SeverityBadge severity={rule.severity} />}
                 />
                 <InfoRow
-                  label="Status"
+                  label={tc('status')}
                   value={
                     <span
                       className={cn(
@@ -759,12 +763,12 @@ export default function AlertRuleDetailPage() {
                           : 'bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300',
                       )}
                     >
-                      {rule.enabled ? 'Enabled' : 'Disabled'}
+                      {rule.enabled ? tc('enabled') : tc('disabled')}
                     </span>
                   }
                 />
                 <InfoRow
-                  label="Notify Channels"
+                  label={t('alertRules.detail.notifyChannels')}
                   value={
                     rule.notifyChannels.length > 0 ? (
                       <div className="flex flex-wrap gap-1.5">
@@ -778,16 +782,16 @@ export default function AlertRuleDetailPage() {
                         ))}
                       </div>
                     ) : (
-                      'None configured'
+                      t('alertRules.detail.noneConfigured')
                     )
                   }
                 />
                 <InfoRow
-                  label="Cooldown"
+                  label={t('alertRules.detail.cooldown')}
                   value={`${rule.cooldownMinutes} minute${rule.cooldownMinutes !== 1 ? 's' : ''}`}
                 />
-                <InfoRow label="Created" value={formatDate(rule.createdAt)} />
-                <InfoRow label="Updated" value={formatDate(rule.updatedAt)} />
+                <InfoRow label={tc('created')} value={formatDate(rule.createdAt)} />
+                <InfoRow label={tc('updated')} value={formatDate(rule.updatedAt)} />
               </dl>
             )}
           </div>
@@ -795,7 +799,7 @@ export default function AlertRuleDetailPage() {
           {/* Recent Alert Events */}
           <div className="bg-card border rounded-lg p-6">
             <h2 className="text-lg font-semibold mb-4">
-              Recent Alert Events
+              {t('alertRules.detail.recentAlertEvents')}
               <span className="text-sm font-normal text-muted-foreground ml-2">
                 ({alertEvents.length})
               </span>
@@ -803,20 +807,20 @@ export default function AlertRuleDetailPage() {
 
             {alertEvents.length === 0 ? (
               <p className="text-sm text-muted-foreground py-8 text-center">
-                No alert events triggered by this rule yet.
+                {t('alertRules.detail.noAlertEvents')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Severity</th>
-                      <th className="text-left px-3 py-2 font-medium">Metric</th>
-                      <th className="text-left px-3 py-2 font-medium">Value</th>
-                      <th className="text-left px-3 py-2 font-medium">Threshold</th>
-                      <th className="text-left px-3 py-2 font-medium">Message</th>
-                      <th className="text-left px-3 py-2 font-medium">Status</th>
-                      <th className="text-right px-3 py-2 font-medium">Triggered</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.severity')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.metric')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.value')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.threshold')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.message')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('alertRules.detail.eventTable.status')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('alertRules.detail.eventTable.triggered')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -843,11 +847,11 @@ export default function AlertRuleDetailPage() {
                         <td className="px-3 py-2">
                           {event.resolvedAt ? (
                             <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400">
-                              Resolved
+                              {t('alertRules.detail.eventStatus.resolved')}
                             </span>
                           ) : (
                             <span className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400">
-                              Active
+                              {t('alertRules.detail.eventStatus.active')}
                             </span>
                           )}
                         </td>
@@ -867,14 +871,14 @@ export default function AlertRuleDetailPage() {
         <div className="space-y-6">
           {/* Rule Summary */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Rule Summary</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('alertRules.detail.ruleSummary')}</h2>
             <div className="space-y-4">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Severity</span>
+                <span className="text-sm text-muted-foreground">{tc('severity')}</span>
                 <SeverityBadge severity={rule.severity} />
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Status</span>
+                <span className="text-sm text-muted-foreground">{tc('status')}</span>
                 <span
                   className={cn(
                     'inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium',
@@ -883,15 +887,15 @@ export default function AlertRuleDetailPage() {
                       : 'bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300',
                   )}
                 >
-                  {rule.enabled ? 'Enabled' : 'Disabled'}
+                  {rule.enabled ? tc('enabled') : tc('disabled')}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Cooldown</span>
+                <span className="text-sm text-muted-foreground">{t('alertRules.detail.cooldown')}</span>
                 <span className="text-sm font-medium">{rule.cooldownMinutes}m</span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Total Events</span>
+                <span className="text-sm text-muted-foreground">{t('alertRules.detail.totalEvents')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {eventsData?.total ?? alertEvents.length}
                 </span>
@@ -900,7 +904,7 @@ export default function AlertRuleDetailPage() {
 
             {/* Rule expression display */}
             <div className="mt-4 p-3 bg-muted/50 rounded-md">
-              <p className="text-xs text-muted-foreground mb-1">Rule Expression</p>
+              <p className="text-xs text-muted-foreground mb-1">{t('alertRules.detail.ruleExpression')}</p>
               <p className="text-sm font-mono">
                 {rule.metric} {rule.condition} {rule.threshold}
               </p>
@@ -909,10 +913,10 @@ export default function AlertRuleDetailPage() {
 
           {/* Notify Channels */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Notify Channels</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('alertRules.detail.notifyChannels')}</h2>
             {rule.notifyChannels.length === 0 ? (
               <p className="text-sm text-muted-foreground">
-                No notification channels configured.
+                {t('alertRules.detail.noNotificationChannels')}
               </p>
             ) : (
               <div className="flex flex-wrap gap-2">
@@ -930,7 +934,7 @@ export default function AlertRuleDetailPage() {
 
           {/* Quick Actions card */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('alertRules.detail.quickActions')}</h2>
             <div className="space-y-3">
               {/* Toggle enabled */}
               <button
@@ -944,10 +948,10 @@ export default function AlertRuleDetailPage() {
                 )}
               >
                 {toggleMutation.isPending
-                  ? 'Updating...'
+                  ? t('alertRules.detail.updating')
                   : rule.enabled
-                    ? 'Disable Rule'
-                    : 'Enable Rule'}
+                    ? t('alertRules.detail.disableRule')
+                    : t('alertRules.detail.enableRule')}
               </button>
 
               {/* Edit */}
@@ -955,7 +959,7 @@ export default function AlertRuleDetailPage() {
                 onClick={startEditing}
                 className="w-full px-4 py-2 text-sm rounded-md border border-input hover:bg-accent font-medium transition-colors"
               >
-                Edit Rule
+                {t('alertRules.detail.editRule')}
               </button>
 
               {/* Delete */}
@@ -964,29 +968,29 @@ export default function AlertRuleDetailPage() {
                 disabled={deleteMutation.isPending}
                 className="w-full px-4 py-2 text-sm rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 font-medium transition-colors disabled:opacity-50"
               >
-                Delete Rule
+                {t('alertRules.detail.deleteRule')}
               </button>
             </div>
           </div>
 
           {/* Metadata */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Metadata</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('alertRules.detail.metadata')}</h2>
             <div className="space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Rule ID</span>
+                <span className="text-sm text-muted-foreground">{t('alertRules.detail.ruleId')}</span>
                 <code className="text-xs font-mono text-muted-foreground bg-muted px-1.5 py-0.5 rounded">
                   {rule.id}
                 </code>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Created</span>
+                <span className="text-sm text-muted-foreground">{tc('created')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(rule.createdAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Updated</span>
+                <span className="text-sm text-muted-foreground">{tc('updated')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(rule.updatedAt)}
                 </span>
diff --git a/it0-web-admin/src/app/(admin)/monitoring/alert-rules/page.tsx b/it0-web-admin/src/app/(admin)/monitoring/alert-rules/page.tsx
index 40ec8a7..3ff157b 100644
--- a/it0-web-admin/src/app/(admin)/monitoring/alert-rules/page.tsx
+++ b/it0-web-admin/src/app/(admin)/monitoring/alert-rules/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -48,27 +49,27 @@ interface AlertRulesResponse {
 // Constants
 // ---------------------------------------------------------------------------
 
-const METRICS: { label: string; value: Metric }[] = [
-  { label: 'CPU Usage', value: 'cpu_usage' },
-  { label: 'Memory Usage', value: 'memory_usage' },
-  { label: 'Disk Usage', value: 'disk_usage' },
-  { label: 'Network Latency', value: 'network_latency' },
-  { label: 'HTTP Error Rate', value: 'http_error_rate' },
-  { label: 'Custom', value: 'custom' },
+const METRICS: { labelKey: string; value: Metric }[] = [
+  { labelKey: 'alertRules.metrics.cpuUsage', value: 'cpu_usage' },
+  { labelKey: 'alertRules.metrics.memoryUsage', value: 'memory_usage' },
+  { labelKey: 'alertRules.metrics.diskUsage', value: 'disk_usage' },
+  { labelKey: 'alertRules.metrics.networkLatency', value: 'network_latency' },
+  { labelKey: 'alertRules.metrics.httpErrorRate', value: 'http_error_rate' },
+  { labelKey: 'alertRules.metrics.custom', value: 'custom' },
 ];
 
-const CONDITIONS: { label: string; value: Condition }[] = [
-  { label: '> (greater than)', value: 'gt' },
-  { label: '< (less than)', value: 'lt' },
-  { label: '>= (greater or equal)', value: 'gte' },
-  { label: '<= (less or equal)', value: 'lte' },
-  { label: '= (equal)', value: 'eq' },
+const CONDITIONS: { labelKey: string; value: Condition }[] = [
+  { labelKey: 'alertRules.conditions.greaterThan', value: 'gt' },
+  { labelKey: 'alertRules.conditions.lessThan', value: 'lt' },
+  { labelKey: 'alertRules.conditions.greaterOrEqual', value: 'gte' },
+  { labelKey: 'alertRules.conditions.lessOrEqual', value: 'lte' },
+  { labelKey: 'alertRules.conditions.equal', value: 'eq' },
 ];
 
-const SEVERITIES: { label: string; value: Severity }[] = [
-  { label: 'Critical', value: 'critical' },
-  { label: 'Warning', value: 'warning' },
-  { label: 'Info', value: 'info' },
+const SEVERITIES: { labelKey: string; value: Severity }[] = [
+  { labelKey: 'alertRules.severities.critical', value: 'critical' },
+  { labelKey: 'alertRules.severities.warning', value: 'warning' },
+  { labelKey: 'alertRules.severities.info', value: 'info' },
 ];
 
 const DURATIONS: { label: string; value: string }[] = [
@@ -88,13 +89,13 @@ const CONDITION_SYMBOLS: Record<Condition, string> = {
   eq: '=',
 };
 
-const METRIC_LABELS: Record<Metric, string> = {
-  cpu_usage: 'CPU Usage',
-  memory_usage: 'Memory Usage',
-  disk_usage: 'Disk Usage',
-  network_latency: 'Network Latency',
-  http_error_rate: 'HTTP Error Rate',
-  custom: 'Custom',
+const METRIC_LABEL_KEYS: Record<Metric, string> = {
+  cpu_usage: 'alertRules.metrics.cpuUsage',
+  memory_usage: 'alertRules.metrics.memoryUsage',
+  disk_usage: 'alertRules.metrics.diskUsage',
+  network_latency: 'alertRules.metrics.networkLatency',
+  http_error_rate: 'alertRules.metrics.httpErrorRate',
+  custom: 'alertRules.metrics.custom',
 };
 
 const EMPTY_FORM: AlertRuleFormData = {
@@ -190,6 +191,8 @@ function AlertRuleDialog({
   onChange: (field: keyof AlertRuleFormData, value: string | number | boolean) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('monitoring');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
@@ -205,7 +208,7 @@ function AlertRuleDialog({
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('alertRules.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -224,7 +227,7 @@ function AlertRuleDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('alertRules.form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -236,7 +239,7 @@ function AlertRuleDialog({
 
           {/* metric */}
           <div>
-            <label className="block text-sm font-medium mb-1">Metric</label>
+            <label className="block text-sm font-medium mb-1">{t('alertRules.form.metric')}</label>
             <select
               value={form.metric}
               onChange={(e) => onChange('metric', e.target.value)}
@@ -244,7 +247,7 @@ function AlertRuleDialog({
             >
               {METRICS.map((m) => (
                 <option key={m.value} value={m.value}>
-                  {m.label}
+                  {t(m.labelKey)}
                 </option>
               ))}
             </select>
@@ -254,7 +257,7 @@ function AlertRuleDialog({
           <div className="grid grid-cols-2 gap-4">
             {/* condition */}
             <div>
-              <label className="block text-sm font-medium mb-1">Condition</label>
+              <label className="block text-sm font-medium mb-1">{t('alertRules.form.condition')}</label>
               <select
                 value={form.condition}
                 onChange={(e) => onChange('condition', e.target.value)}
@@ -262,7 +265,7 @@ function AlertRuleDialog({
               >
                 {CONDITIONS.map((c) => (
                   <option key={c.value} value={c.value}>
-                    {c.label}
+                    {t(c.labelKey)}
                   </option>
                 ))}
               </select>
@@ -271,7 +274,7 @@ function AlertRuleDialog({
             {/* threshold */}
             <div>
               <label className="block text-sm font-medium mb-1">
-                Threshold <span className="text-destructive">*</span>
+                {t('alertRules.form.threshold')} <span className="text-destructive">*</span>
               </label>
               <input
                 type="number"
@@ -310,7 +313,7 @@ function AlertRuleDialog({
 
             {/* severity */}
             <div>
-              <label className="block text-sm font-medium mb-1">Severity</label>
+              <label className="block text-sm font-medium mb-1">{t('alertRules.form.severity')}</label>
               <select
                 value={form.severity}
                 onChange={(e) => onChange('severity', e.target.value)}
@@ -318,7 +321,7 @@ function AlertRuleDialog({
               >
                 {SEVERITIES.map((s) => (
                   <option key={s.value} value={s.value}>
-                    {s.label}
+                    {t(s.labelKey)}
                   </option>
                 ))}
               </select>
@@ -342,7 +345,7 @@ function AlertRuleDialog({
 
           {/* enabled toggle */}
           <div className="flex items-center justify-between">
-            <label className="text-sm font-medium">Enabled</label>
+            <label className="text-sm font-medium">{t('alertRules.form.enabled')}</label>
             <button
               type="button"
               onClick={() => onChange('enabled', !form.enabled)}
@@ -371,7 +374,7 @@ function AlertRuleDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -379,7 +382,7 @@ function AlertRuleDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -404,15 +407,17 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('monitoring');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Alert Rule</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('alertRules.deleteRule')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{ruleName}</strong>? This action cannot be undone.
+          {t('alertRules.deleteConfirm')} <strong>{ruleName}</strong>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -420,14 +425,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -440,6 +445,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function AlertRulesPage() {
+  const { t } = useTranslation('monitoring');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -584,30 +591,30 @@ export default function AlertRulesPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Alert Rules</h1>
+          <h1 className="text-2xl font-bold">{t('alertRules.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Configure alert rules to monitor server metrics and receive notifications.
+            {t('alertRules.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Rule
+          {t('alertRules.addRule')}
         </button>
       </div>
 
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load alert rules: {(error as Error).message}
+          {t('alertRules.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading alert rules...
+          {t('alertRules.loading')}
         </div>
       )}
 
@@ -618,13 +625,13 @@ export default function AlertRulesPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Name</th>
-                  <th className="text-left px-4 py-3 font-medium">Metric</th>
-                  <th className="text-left px-4 py-3 font-medium">Condition</th>
-                  <th className="text-left px-4 py-3 font-medium">Threshold</th>
-                  <th className="text-left px-4 py-3 font-medium">Severity</th>
-                  <th className="text-left px-4 py-3 font-medium">Enabled</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.name')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.metric')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.condition')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.threshold')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.severity')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('alertRules.table.enabled')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('alertRules.table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -634,7 +641,7 @@ export default function AlertRulesPage() {
                       colSpan={7}
                       className="text-center text-muted-foreground py-12"
                     >
-                      No alert rules found.
+                      {t('alertRules.empty')}
                     </td>
                   </tr>
                 ) : (
@@ -653,7 +660,7 @@ export default function AlertRulesPage() {
                       </td>
                       <td className="px-4 py-3">
                         <span className="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-muted">
-                          {METRIC_LABELS[rule.metric] ?? rule.metric}
+                          {t(METRIC_LABEL_KEYS[rule.metric]) ?? rule.metric}
                         </span>
                       </td>
                       <td className="px-4 py-3 font-mono text-xs">
@@ -688,13 +695,13 @@ export default function AlertRulesPage() {
                             onClick={() => openEdit(rule)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            Edit
+                            {tc('edit')}
                           </button>
                           <button
                             onClick={() => setDeleteTarget(rule)}
                             className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         </div>
                       </td>
@@ -710,7 +717,7 @@ export default function AlertRulesPage() {
       {/* Add / Edit dialog */}
       <AlertRuleDialog
         open={dialogOpen}
-        title={editingRule ? 'Edit Alert Rule' : 'Add Alert Rule'}
+        title={editingRule ? t('alertRules.editRule') : t('alertRules.addRule')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/monitoring/health-checks/page.tsx b/it0-web-admin/src/app/(admin)/monitoring/health-checks/page.tsx
index 2cabeb5..5e572c7 100644
--- a/it0-web-admin/src/app/(admin)/monitoring/health-checks/page.tsx
+++ b/it0-web-admin/src/app/(admin)/monitoring/health-checks/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect, useMemo, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -35,18 +36,18 @@ type RefreshInterval = 0 | 10 | 30 | 60;
 // Constants
 // ---------------------------------------------------------------------------
 
-const STATUS_FILTERS: { label: string; value: StatusFilter }[] = [
-  { label: 'All', value: 'all' },
-  { label: 'Healthy', value: 'healthy' },
-  { label: 'Degraded', value: 'degraded' },
-  { label: 'Down', value: 'down' },
+const STATUS_FILTERS: { labelKey: string; value: StatusFilter }[] = [
+  { labelKey: 'healthChecks.filters.all', value: 'all' },
+  { labelKey: 'healthChecks.filters.healthy', value: 'healthy' },
+  { labelKey: 'healthChecks.filters.degraded', value: 'degraded' },
+  { labelKey: 'healthChecks.filters.down', value: 'down' },
 ];
 
-const REFRESH_OPTIONS: { label: string; value: RefreshInterval }[] = [
-  { label: 'Off', value: 0 },
-  { label: '10s', value: 10 },
-  { label: '30s', value: 30 },
-  { label: '60s', value: 60 },
+const REFRESH_OPTIONS: { labelKey: string; value: RefreshInterval }[] = [
+  { labelKey: 'healthChecks.refreshOptions.off', value: 0 },
+  { labelKey: 'healthChecks.refreshOptions.10s', value: 10 },
+  { labelKey: 'healthChecks.refreshOptions.30s', value: 30 },
+  { labelKey: 'healthChecks.refreshOptions.60s', value: 60 },
 ];
 
 // ---------------------------------------------------------------------------
@@ -123,6 +124,7 @@ function StatCard({ label, value, dotColor }: { label: string; value: number; do
 // ---------------------------------------------------------------------------
 
 function HealthCheckCard({ check }: { check: HealthCheckResult }) {
+  const { t } = useTranslation('monitoring');
   return (
     <div className="bg-card border rounded-lg p-4 hover:shadow-sm transition-shadow">
       <div className="flex items-start justify-between gap-3 mb-3">
@@ -134,21 +136,21 @@ function HealthCheckCard({ check }: { check: HealthCheckResult }) {
           <p className="text-xs text-muted-foreground font-mono mt-0.5 ml-[18px]">{check.serverHost}</p>
         </div>
         <span className={cn('inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium uppercase flex-shrink-0', getCheckTypeBadgeColor(check.checkType))}>
-          {check.checkType}
+          {t(`healthChecks.checkTypes.${check.checkType}`)}
         </span>
       </div>
 
       <div className="grid grid-cols-3 gap-3 text-center">
         <div>
-          <p className="text-xs text-muted-foreground mb-0.5">Latency</p>
+          <p className="text-xs text-muted-foreground mb-0.5">{t('healthChecks.card.latency')}</p>
           <p className={cn('text-sm font-semibold', getLatencyColor(check.latencyMs))}>{check.latencyMs}ms</p>
         </div>
         <div>
-          <p className="text-xs text-muted-foreground mb-0.5">Uptime (24h)</p>
+          <p className="text-xs text-muted-foreground mb-0.5">{t('healthChecks.card.uptime24h')}</p>
           <p className={cn('text-sm font-semibold', getUptimeColor(check.uptimePercent))}>{check.uptimePercent.toFixed(1)}%</p>
         </div>
         <div>
-          <p className="text-xs text-muted-foreground mb-0.5">Last Check</p>
+          <p className="text-xs text-muted-foreground mb-0.5">{t('healthChecks.card.lastCheck')}</p>
           <p className="text-sm font-medium text-muted-foreground">{formatRelativeTime(check.lastCheckedAt)}</p>
         </div>
       </div>
@@ -167,6 +169,7 @@ function HealthCheckCard({ check }: { check: HealthCheckResult }) {
 // ---------------------------------------------------------------------------
 
 export default function HealthChecksPage() {
+  const { t } = useTranslation('monitoring');
   const queryClient = useQueryClient();
 
   const [statusFilter, setStatusFilter] = useState<StatusFilter>('all');
@@ -209,24 +212,24 @@ export default function HealthChecksPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Health Checks</h1>
-          <p className="text-sm text-muted-foreground mt-1">Monitor server health and availability</p>
+          <h1 className="text-2xl font-bold">{t('healthChecks.title')}</h1>
+          <p className="text-sm text-muted-foreground mt-1">{t('healthChecks.subtitle')}</p>
         </div>
         <div className="flex items-center gap-2">
-          <span className="text-sm text-muted-foreground">Auto-refresh:</span>
+          <span className="text-sm text-muted-foreground">{t('healthChecks.autoRefresh')}</span>
           <select
             value={refreshInterval}
             onChange={(e) => handleRefreshChange(Number(e.target.value) as RefreshInterval)}
             className="px-2 py-1.5 bg-background border border-input rounded-md text-sm"
           >
             {REFRESH_OPTIONS.map((opt) => (
-              <option key={opt.value} value={opt.value}>{opt.label}</option>
+              <option key={opt.value} value={opt.value}>{t(opt.labelKey)}</option>
             ))}
           </select>
           {refreshInterval > 0 && (
             <span className="flex items-center gap-1.5 text-xs text-muted-foreground">
               <span className="w-1.5 h-1.5 rounded-full bg-green-500 animate-pulse" />
-              Live
+              {t('healthChecks.live')}
             </span>
           )}
         </div>
@@ -234,10 +237,10 @@ export default function HealthChecksPage() {
 
       {/* Summary stats */}
       <div className="grid grid-cols-2 sm:grid-cols-4 gap-4 mb-6">
-        <StatCard label="Total Servers" value={stats.total} />
-        <StatCard label="Healthy" value={stats.healthy} dotColor="bg-green-500" />
-        <StatCard label="Degraded" value={stats.degraded} dotColor="bg-yellow-500" />
-        <StatCard label="Down" value={stats.down} dotColor="bg-red-500" />
+        <StatCard label={t('healthChecks.stats.totalServers')} value={stats.total} />
+        <StatCard label={t('healthChecks.stats.healthy')} value={stats.healthy} dotColor="bg-green-500" />
+        <StatCard label={t('healthChecks.stats.degraded')} value={stats.degraded} dotColor="bg-yellow-500" />
+        <StatCard label={t('healthChecks.stats.down')} value={stats.down} dotColor="bg-red-500" />
       </div>
 
       {/* Filter tabs */}
@@ -253,7 +256,7 @@ export default function HealthChecksPage() {
                 : 'text-muted-foreground hover:text-foreground',
             )}
           >
-            {filter.label}
+            {t(filter.labelKey)}
             {filter.value !== 'all' && (
               <span className="ml-1.5 text-xs text-muted-foreground">
                 {filter.value === 'healthy' && stats.healthy}
@@ -267,19 +270,19 @@ export default function HealthChecksPage() {
 
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load health checks: {(error as Error).message}
+          {t('healthChecks.loadError')} {(error as Error).message}
         </div>
       )}
 
       {isLoading && (
-        <div className="text-sm text-muted-foreground py-12 text-center">Loading health checks...</div>
+        <div className="text-sm text-muted-foreground py-12 text-center">{t('healthChecks.loading')}</div>
       )}
 
       {!isLoading && !error && (
         <>
           {filteredChecks.length === 0 ? (
             <div className="text-sm text-muted-foreground py-12 text-center">
-              {statusFilter === 'all' ? 'No health checks found.' : `No servers with status "${statusFilter}" found.`}
+              {statusFilter === 'all' ? t('healthChecks.empty') : t('healthChecks.noMatchingStatus', { status: statusFilter })}
             </div>
           ) : (
             <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
diff --git a/it0-web-admin/src/app/(admin)/monitoring/metrics/page.tsx b/it0-web-admin/src/app/(admin)/monitoring/metrics/page.tsx
index 5b99213..6b379a0 100644
--- a/it0-web-admin/src/app/(admin)/monitoring/metrics/page.tsx
+++ b/it0-web-admin/src/app/(admin)/monitoring/metrics/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect, useMemo, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -47,17 +48,17 @@ type SortDirection = 'asc' | 'desc';
 // Constants
 // ---------------------------------------------------------------------------
 
-const ENV_FILTERS: { label: string; value: EnvironmentFilter }[] = [
-  { label: 'All', value: 'all' },
-  { label: 'Dev', value: 'dev' },
-  { label: 'Staging', value: 'staging' },
-  { label: 'Prod', value: 'prod' },
+const ENV_FILTERS: { labelKey: string; value: EnvironmentFilter }[] = [
+  { labelKey: 'metrics.filters.all', value: 'all' },
+  { labelKey: 'metrics.filters.dev', value: 'dev' },
+  { labelKey: 'metrics.filters.staging', value: 'staging' },
+  { labelKey: 'metrics.filters.prod', value: 'prod' },
 ];
 
-const STATUS_FILTERS: { label: string; value: StatusFilter }[] = [
-  { label: 'All', value: 'all' },
-  { label: 'Online', value: 'online' },
-  { label: 'Offline', value: 'offline' },
+const STATUS_FILTERS: { labelKey: string; value: StatusFilter }[] = [
+  { labelKey: 'metrics.filters.all', value: 'all' },
+  { labelKey: 'metrics.filters.online', value: 'online' },
+  { labelKey: 'metrics.filters.offline', value: 'offline' },
 ];
 
 // ---------------------------------------------------------------------------
@@ -230,6 +231,7 @@ function SortableHeader({
 // ---------------------------------------------------------------------------
 
 export default function MetricsPage() {
+  const { t } = useTranslation('monitoring');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -330,9 +332,9 @@ export default function MetricsPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Metrics Dashboard</h1>
+          <h1 className="text-2xl font-bold">{t('metrics.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Monitor server performance and resource utilization
+            {t('metrics.subtitle')}
           </p>
         </div>
         <div className="flex items-center gap-3">
@@ -343,12 +345,12 @@ export default function MetricsPage() {
               onChange={(e) => setAutoRefresh(e.target.checked)}
               className="h-4 w-4 rounded border-input text-primary focus:ring-primary cursor-pointer"
             />
-            Auto-refresh (30s)
+            {t('metrics.autoRefresh')}
           </label>
           {autoRefresh && (
             <span className="flex items-center gap-1.5 text-xs text-muted-foreground">
               <span className="w-1.5 h-1.5 rounded-full bg-green-500 animate-pulse" />
-              Live
+              {t('metrics.live')}
             </span>
           )}
         </div>
@@ -358,29 +360,29 @@ export default function MetricsPage() {
       {overview && (
         <div className="grid grid-cols-2 sm:grid-cols-3 lg:grid-cols-5 gap-4 mb-6">
           <OverviewCard
-            label="Total Servers"
+            label={t('metrics.overview.totalServers')}
             value={overview.totalServers}
           />
           <OverviewCard
-            label="Online"
+            label={t('metrics.overview.online')}
             value={`${overview.onlinePercent.toFixed(1)}`}
             suffix="%"
             color={overview.onlinePercent >= 95 ? 'text-green-600 dark:text-green-400' : 'text-yellow-600 dark:text-yellow-400'}
           />
           <OverviewCard
-            label="Avg CPU"
+            label={t('metrics.overview.avgCpu')}
             value={`${overview.avgCpuPercent.toFixed(1)}`}
             suffix="%"
             color={getPercentColor(overview.avgCpuPercent)}
           />
           <OverviewCard
-            label="Avg Memory"
+            label={t('metrics.overview.avgMemory')}
             value={`${overview.avgMemoryPercent.toFixed(1)}`}
             suffix="%"
             color={getPercentColor(overview.avgMemoryPercent)}
           />
           <OverviewCard
-            label="Alerts Today"
+            label={t('metrics.overview.alertsToday')}
             value={overview.totalAlertsToday}
             color={overview.totalAlertsToday > 0 ? 'text-red-600 dark:text-red-400' : undefined}
           />
@@ -407,7 +409,7 @@ export default function MetricsPage() {
             value={search}
             onChange={(e) => setSearch(e.target.value)}
             className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-            placeholder="Search by hostname..."
+            placeholder={t('metrics.searchPlaceholder')}
           />
         </div>
 
@@ -424,7 +426,7 @@ export default function MetricsPage() {
                   : 'text-muted-foreground hover:text-foreground',
               )}
             >
-              {f.label}
+              {t(f.labelKey)}
             </button>
           ))}
         </div>
@@ -442,7 +444,7 @@ export default function MetricsPage() {
                   : 'text-muted-foreground hover:text-foreground',
               )}
             >
-              {f.label}
+              {t(f.labelKey)}
             </button>
           ))}
         </div>
@@ -451,14 +453,14 @@ export default function MetricsPage() {
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load server metrics: {(error as Error).message}
+          {t('metrics.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {serversLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading server metrics...
+          {t('metrics.loading')}
         </div>
       )}
 
@@ -470,43 +472,43 @@ export default function MetricsPage() {
               <thead>
                 <tr className="border-b bg-muted/50">
                   <SortableHeader
-                    label="Hostname"
+                    label={t('metrics.table.hostname')}
                     field="hostname"
                     currentSort={sortField}
                     currentDirection={sortDirection}
                     onSort={handleSort}
                   />
-                  <th className="text-left px-4 py-3 font-medium">Env</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('metrics.table.env')}</th>
                   <SortableHeader
-                    label="Status"
+                    label={t('metrics.table.status')}
                     field="status"
                     currentSort={sortField}
                     currentDirection={sortDirection}
                     onSort={handleSort}
                   />
                   <SortableHeader
-                    label="CPU %"
+                    label={t('metrics.table.cpuPercent')}
                     field="cpuPercent"
                     currentSort={sortField}
                     currentDirection={sortDirection}
                     onSort={handleSort}
                   />
                   <SortableHeader
-                    label="Memory %"
+                    label={t('metrics.table.memoryPercent')}
                     field="memoryPercent"
                     currentSort={sortField}
                     currentDirection={sortDirection}
                     onSort={handleSort}
                   />
                   <SortableHeader
-                    label="Disk %"
+                    label={t('metrics.table.diskPercent')}
                     field="diskPercent"
                     currentSort={sortField}
                     currentDirection={sortDirection}
                     onSort={handleSort}
                   />
                   <SortableHeader
-                    label="Last Checked"
+                    label={t('metrics.table.lastChecked')}
                     field="lastCheckedAt"
                     currentSort={sortField}
                     currentDirection={sortDirection}
@@ -523,8 +525,8 @@ export default function MetricsPage() {
                       className="text-center text-muted-foreground py-12"
                     >
                       {allServers.length === 0
-                        ? 'No server metrics available.'
-                        : 'No servers match the current filters.'}
+                        ? t('metrics.empty')
+                        : t('metrics.noMatchingFilters')}
                     </td>
                   </tr>
                 ) : (
@@ -566,7 +568,7 @@ export default function MetricsPage() {
       {/* Results count */}
       {!serversLoading && !error && allServers.length > 0 && (
         <div className="mt-3 text-xs text-muted-foreground">
-          Showing {filteredServers.length} of {allServers.length} server{allServers.length !== 1 ? 's' : ''}
+          {t('metrics.showing', { count: filteredServers.length, total: allServers.length })}
         </div>
       )}
     </div>
diff --git a/it0-web-admin/src/app/(admin)/runbooks/[id]/page.tsx b/it0-web-admin/src/app/(admin)/runbooks/[id]/page.tsx
index 3c2a5b9..2a0071c 100644
--- a/it0-web-admin/src/app/(admin)/runbooks/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/runbooks/[id]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -54,13 +55,6 @@ const AVAILABLE_TOOLS = [
   'ping',
 ];
 
-const RISK_LEVEL_LABELS: Record<number, string> = {
-  0: 'L0 - Info',
-  1: 'L1 - Low',
-  2: 'L2 - Medium',
-  3: 'L3 - High',
-};
-
 const RISK_LEVEL_STYLES: Record<number, string> = {
   0: 'bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400',
   1: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400',
@@ -85,6 +79,7 @@ const EXECUTION_STATUS_STYLES: Record<string, string> = {
 // ---------------------------------------------------------------------------
 
 function RiskBadge({ level }: { level: number }) {
+  const { t } = useTranslation('runbooks');
   return (
     <span
       className={cn(
@@ -92,7 +87,7 @@ function RiskBadge({ level }: { level: number }) {
         RISK_LEVEL_STYLES[level] ?? RISK_LEVEL_STYLES[0],
       )}
     >
-      {RISK_LEVEL_LABELS[level] ?? `L${level}`}
+      {t(`riskLevels.${level}`) ?? `L${level}`}
     </span>
   );
 }
@@ -182,16 +177,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('runbooks');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Runbook</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteDialog.title')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{name}</strong>? This action
-          cannot be undone. All execution history will also be removed.
+          {t('deleteDialog.message')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -199,14 +196,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -241,6 +238,8 @@ function formatDuration(ms?: number): string {
 // ---------------------------------------------------------------------------
 
 export default function RunbookDetailPage() {
+  const { t } = useTranslation('runbooks');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const id = params.id as string;
@@ -363,7 +362,7 @@ export default function RunbookDetailPage() {
 
   const handleToggleTool = useCallback((tool: string) => {
     setToolsDraft((prev) =>
-      prev.includes(tool) ? prev.filter((t) => t !== tool) : [...prev, tool],
+      prev.includes(tool) ? prev.filter((item) => item !== tool) : [...prev, tool],
     );
   }, []);
 
@@ -401,7 +400,7 @@ export default function RunbookDetailPage() {
   if (isLoading) {
     return (
       <div className="text-sm text-muted-foreground py-12 text-center">
-        Loading runbook...
+        {t('detail.loading')}
       </div>
     );
   }
@@ -414,10 +413,10 @@ export default function RunbookDetailPage() {
           onClick={() => router.push('/runbooks')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Runbooks
+          &larr; {t('detail.backToRunbooks')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load runbook: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -431,10 +430,10 @@ export default function RunbookDetailPage() {
           onClick={() => router.push('/runbooks')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Runbooks
+          &larr; {t('detail.backToRunbooks')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Runbook not found.
+          {t('detail.notFound')}
         </div>
       </div>
     );
@@ -450,13 +449,13 @@ export default function RunbookDetailPage() {
             onClick={() => router.push('/runbooks')}
             className="text-sm text-muted-foreground hover:text-foreground inline-flex items-center gap-1"
           >
-            &larr; Back
+            &larr; {t('detail.back')}
           </button>
           <div className="h-6 w-px bg-border" />
           <div>
             <h1 className="text-2xl font-bold">{runbook.name}</h1>
             <p className="text-sm text-muted-foreground mt-0.5">
-              {runbook.description || 'No description'}
+              {runbook.description || t('detail.noDescription')}
             </p>
           </div>
         </div>
@@ -471,7 +470,7 @@ export default function RunbookDetailPage() {
                 : 'bg-gray-100 text-gray-800 dark:bg-gray-800 dark:text-gray-300',
             )}
           >
-            {runbook.enabled ? 'Enabled' : 'Disabled'}
+            {runbook.enabled ? tc('enabled') : tc('disabled')}
           </span>
         </div>
       </div>
@@ -493,17 +492,17 @@ export default function RunbookDetailPage() {
         <div className="lg:col-span-2 space-y-6">
           {/* Overview card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Overview</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.overview')}</h2>
             <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Name
+                  {t('form.name')}
                 </label>
                 <p className="text-sm mt-1">{runbook.name}</p>
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Trigger Type
+                  {t('detail.triggerType')}
                 </label>
                 <p className="mt-1">
                   <TriggerBadge type={runbook.triggerType} />
@@ -511,15 +510,15 @@ export default function RunbookDetailPage() {
               </div>
               <div className="sm:col-span-2">
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Description
+                  {tc('description')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
-                  {runbook.description || 'No description provided.'}
+                  {runbook.description || t('detail.noDescription')}
                 </p>
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Created
+                  {tc('created')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
                   {formatDate(runbook.createdAt)}
@@ -527,7 +526,7 @@ export default function RunbookDetailPage() {
               </div>
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Updated
+                  {tc('updated')}
                 </label>
                 <p className="text-sm mt-1 text-muted-foreground">
                   {formatDate(runbook.updatedAt)}
@@ -539,7 +538,7 @@ export default function RunbookDetailPage() {
           {/* Prompt Template section */}
           <div className="border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Prompt Template</h2>
+              <h2 className="text-lg font-semibold">{t('detail.promptTemplate')}</h2>
               <div className="flex items-center gap-2">
                 {isEditingPrompt ? (
                   <>
@@ -547,14 +546,14 @@ export default function RunbookDetailPage() {
                       onClick={handleCancelEditPrompt}
                       className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                     >
-                      Cancel
+                      {tc('cancel')}
                     </button>
                     <button
                       onClick={handleSavePrompt}
                       disabled={updateMutation.isPending}
                       className="px-3 py-1.5 text-xs rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors"
                     >
-                      {updateMutation.isPending ? 'Saving...' : 'Save'}
+                      {updateMutation.isPending ? tc('saving') : tc('save')}
                     </button>
                   </>
                 ) : (
@@ -562,7 +561,7 @@ export default function RunbookDetailPage() {
                     onClick={handleStartEditPrompt}
                     className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                   >
-                    Edit
+                    {tc('edit')}
                   </button>
                 )}
               </div>
@@ -577,7 +576,7 @@ export default function RunbookDetailPage() {
               />
             ) : (
               <div className="bg-gray-950 text-gray-200 font-mono text-sm p-4 rounded-md whitespace-pre-wrap min-h-[300px]">
-                {runbook.promptTemplate || 'No prompt template defined.'}
+                {runbook.promptTemplate || t('detail.noPrompt')}
               </div>
             )}
           </div>
@@ -585,7 +584,7 @@ export default function RunbookDetailPage() {
           {/* Allowed Tools section */}
           <div className="border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Allowed Tools</h2>
+              <h2 className="text-lg font-semibold">{t('detail.allowedTools')}</h2>
               <div className="flex items-center gap-2">
                 {isEditingTools ? (
                   <>
@@ -593,14 +592,14 @@ export default function RunbookDetailPage() {
                       onClick={handleCancelEditTools}
                       className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                     >
-                      Cancel
+                      {tc('cancel')}
                     </button>
                     <button
                       onClick={handleSaveTools}
                       disabled={updateMutation.isPending}
                       className="px-3 py-1.5 text-xs rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors"
                     >
-                      {updateMutation.isPending ? 'Saving...' : 'Save'}
+                      {updateMutation.isPending ? tc('saving') : tc('save')}
                     </button>
                   </>
                 ) : (
@@ -608,7 +607,7 @@ export default function RunbookDetailPage() {
                     onClick={handleStartEditTools}
                     className="px-3 py-1.5 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                   >
-                    Edit
+                    {tc('edit')}
                   </button>
                 )}
               </div>
@@ -635,7 +634,7 @@ export default function RunbookDetailPage() {
               <div className="flex flex-wrap gap-2">
                 {runbook.allowedTools.length === 0 ? (
                   <p className="text-sm text-muted-foreground">
-                    No tools configured.
+                    {t('detail.noTools')}
                   </p>
                 ) : (
                   runbook.allowedTools.map((tool) => (
@@ -653,18 +652,18 @@ export default function RunbookDetailPage() {
 
           {/* Execution History */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Execution History</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.executionHistory')}</h2>
             <div className="overflow-x-auto">
               <table className="w-full text-sm">
                 <thead>
                   <tr className="border-b bg-muted/50">
-                    <th className="text-left px-4 py-3 font-medium">Date</th>
-                    <th className="text-left px-4 py-3 font-medium">Status</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('detail.executionTable.date')}</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('detail.executionTable.status')}</th>
                     <th className="text-left px-4 py-3 font-medium">
-                      Duration
+                      {t('detail.executionTable.duration')}
                     </th>
                     <th className="text-left px-4 py-3 font-medium">
-                      Triggered By
+                      {t('detail.executionTable.triggeredBy')}
                     </th>
                   </tr>
                 </thead>
@@ -675,7 +674,7 @@ export default function RunbookDetailPage() {
                         colSpan={4}
                         className="text-center text-muted-foreground py-12"
                       >
-                        No executions yet.
+                        {t('detail.noExecutions')}
                       </td>
                     </tr>
                   ) : (
@@ -709,12 +708,12 @@ export default function RunbookDetailPage() {
         <div className="lg:col-span-1 space-y-6">
           {/* Configuration card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Configuration</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.configuration')}</h2>
             <div className="space-y-5">
               {/* Trigger type */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Trigger Type
+                  {t('detail.triggerType')}
                 </label>
                 <p className="mt-1.5">
                   <TriggerBadge type={runbook.triggerType} />
@@ -724,7 +723,7 @@ export default function RunbookDetailPage() {
               {/* Max Risk Level */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
-                  Max Risk Level
+                  {t('detail.maxRiskLevel')}
                 </label>
                 <p className="mt-1.5">
                   <RiskBadge level={runbook.maxRiskLevel} />
@@ -734,29 +733,29 @@ export default function RunbookDetailPage() {
               {/* Auto-Approve toggle */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide block mb-1.5">
-                  Auto-Approve
+                  {t('detail.autoApprove')}
                 </label>
                 <ToggleSwitch
                   checked={runbook.autoApprove}
                   disabled={updateMutation.isPending}
                   onChange={handleToggleAutoApprove}
-                  label={runbook.autoApprove ? 'Enabled' : 'Disabled'}
+                  label={runbook.autoApprove ? tc('enabled') : tc('disabled')}
                 />
                 <p className="text-xs text-muted-foreground mt-1">
-                  Auto-approve actions within the configured risk level.
+                  {t('detail.autoApproveDescription')}
                 </p>
               </div>
 
               {/* Enabled toggle */}
               <div>
                 <label className="text-xs font-medium text-muted-foreground uppercase tracking-wide block mb-1.5">
-                  Status
+                  {t('detail.statusLabel')}
                 </label>
                 <ToggleSwitch
                   checked={runbook.enabled}
                   disabled={updateMutation.isPending}
                   onChange={handleToggleEnabled}
-                  label={runbook.enabled ? 'Enabled' : 'Disabled'}
+                  label={runbook.enabled ? tc('enabled') : tc('disabled')}
                 />
               </div>
             </div>
@@ -764,7 +763,7 @@ export default function RunbookDetailPage() {
 
           {/* Quick Actions card */}
           <div className="border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.quickActions')}</h2>
             <div className="space-y-3">
               {/* Execute Now */}
               <button
@@ -775,11 +774,11 @@ export default function RunbookDetailPage() {
                   'bg-primary text-primary-foreground hover:bg-primary/90',
                 )}
               >
-                {executeMutation.isPending ? 'Executing...' : 'Execute Now'}
+                {executeMutation.isPending ? t('detail.executing') : t('detail.executeNow')}
               </button>
               {!runbook.enabled && (
                 <p className="text-xs text-muted-foreground">
-                  Enable the runbook to execute it.
+                  {t('detail.enableToExecute')}
                 </p>
               )}
 
@@ -789,7 +788,7 @@ export default function RunbookDetailPage() {
                 disabled={duplicateMutation.isPending}
                 className="w-full px-4 py-2 text-sm rounded-md border border-input hover:bg-accent font-medium transition-colors disabled:opacity-50"
               >
-                {duplicateMutation.isPending ? 'Duplicating...' : 'Duplicate'}
+                {duplicateMutation.isPending ? t('detail.duplicating') : t('detail.duplicate')}
               </button>
 
               {/* Delete */}
@@ -798,7 +797,7 @@ export default function RunbookDetailPage() {
                 disabled={deleteMutation.isPending}
                 className="w-full px-4 py-2 text-sm rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 font-medium transition-colors disabled:opacity-50"
               >
-                Delete Runbook
+                {t('detail.deleteRunbook')}
               </button>
             </div>
           </div>
diff --git a/it0-web-admin/src/app/(admin)/runbooks/page.tsx b/it0-web-admin/src/app/(admin)/runbooks/page.tsx
index 40f08d5..f69c438 100644
--- a/it0-web-admin/src/app/(admin)/runbooks/page.tsx
+++ b/it0-web-admin/src/app/(admin)/runbooks/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -40,23 +41,25 @@ const emptyForm: RunbookFormData = {
   autoApprove: false,
 };
 
-const TRIGGER_OPTIONS: { value: RunbookFormData['triggerType']; label: string }[] = [
-  { value: 'manual', label: 'Manual' },
-  { value: 'alert', label: 'Alert' },
-  { value: 'scheduled', label: 'Scheduled' },
-];
-
-const RISK_LEVELS = [
-  { value: 0, label: '0 - Info' },
-  { value: 1, label: '1 - Low' },
-  { value: 2, label: '2 - Medium' },
-  { value: 3, label: '3 - High' },
-];
-
 /* ---------- Component ---------- */
 export default function RunbooksPage() {
+  const { t } = useTranslation('runbooks');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
+  const TRIGGER_OPTIONS: { value: RunbookFormData['triggerType']; label: string }[] = [
+    { value: 'manual', label: t('triggerTypes.manual') },
+    { value: 'alert', label: t('triggerTypes.alert') },
+    { value: 'scheduled', label: t('triggerTypes.scheduled') },
+  ];
+
+  const RISK_LEVELS = [
+    { value: 0, label: t('riskLevels.0') },
+    { value: 1, label: t('riskLevels.1') },
+    { value: 2, label: t('riskLevels.2') },
+    { value: 3, label: t('riskLevels.3') },
+  ];
+
   /* Dialog state */
   const [dialogOpen, setDialogOpen] = useState(false);
   const [editingId, setEditingId] = useState<string | null>(null);
@@ -165,26 +168,26 @@ export default function RunbooksPage() {
       {/* Header */}
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Runbooks</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage operations runbooks and automation scripts.
+            {t('subtitle')}
           </p>
         </div>
         <button
           onClick={openCreate}
           className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:bg-primary/90 transition-colors"
         >
-          New Runbook
+          {t('newRunbook')}
         </button>
       </div>
 
       {/* Loading / Error */}
       {isLoading && (
-        <div className="text-muted-foreground text-sm py-12 text-center">Loading runbooks...</div>
+        <div className="text-muted-foreground text-sm py-12 text-center">{t('loading')}</div>
       )}
       {error && (
         <div className="text-destructive text-sm py-4">
-          Failed to load runbooks: {(error as Error).message}
+          {t('loadError')} {(error as Error).message}
         </div>
       )}
 
@@ -194,19 +197,19 @@ export default function RunbooksPage() {
           <table className="w-full text-sm">
             <thead>
               <tr className="border-b bg-muted/50">
-                <th className="text-left px-4 py-3 font-medium">Name</th>
-                <th className="text-left px-4 py-3 font-medium">Description</th>
-                <th className="text-left px-4 py-3 font-medium">Trigger</th>
-                <th className="text-center px-4 py-3 font-medium">Max Risk</th>
-                <th className="text-center px-4 py-3 font-medium">Auto-Approve</th>
-                <th className="text-right px-4 py-3 font-medium">Actions</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.name')}</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.description')}</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.trigger')}</th>
+                <th className="text-center px-4 py-3 font-medium">{t('table.maxRisk')}</th>
+                <th className="text-center px-4 py-3 font-medium">{t('table.autoApprove')}</th>
+                <th className="text-right px-4 py-3 font-medium">{t('table.actions')}</th>
               </tr>
             </thead>
             <tbody>
               {runbooks.length === 0 ? (
                 <tr>
                   <td colSpan={6} className="px-4 py-12 text-center text-muted-foreground">
-                    No runbooks yet. Click &quot;New Runbook&quot; to create one.
+                    {t('empty')}
                   </td>
                 </tr>
               ) : (
@@ -241,7 +244,7 @@ export default function RunbooksPage() {
                           'relative inline-flex h-5 w-9 items-center rounded-full transition-colors',
                           rb.autoApprove ? 'bg-primary' : 'bg-muted',
                         )}
-                        title={rb.autoApprove ? 'Auto-approve enabled' : 'Auto-approve disabled'}
+                        title={rb.autoApprove ? t('form.autoApprove') + ' ' + tc('enabled').toLowerCase() : t('form.autoApprove') + ' ' + tc('disabled').toLowerCase()}
                       >
                         <span
                           className={cn(
@@ -256,7 +259,7 @@ export default function RunbooksPage() {
                         onClick={() => openEdit(rb)}
                         className="text-xs text-primary hover:underline"
                       >
-                        Edit
+                        {tc('edit')}
                       </button>
                       {deleteConfirmId === rb.id ? (
                         <>
@@ -265,13 +268,13 @@ export default function RunbooksPage() {
                             className="text-xs text-destructive-foreground bg-destructive px-2 py-0.5 rounded hover:bg-destructive/80"
                             disabled={deleteMutation.isPending}
                           >
-                            Confirm
+                            {tc('confirm')}
                           </button>
                           <button
                             onClick={() => setDeleteConfirmId(null)}
                             className="text-xs text-muted-foreground hover:underline"
                           >
-                            Cancel
+                            {tc('cancel')}
                           </button>
                         </>
                       ) : (
@@ -279,7 +282,7 @@ export default function RunbooksPage() {
                           onClick={() => setDeleteConfirmId(rb.id)}
                           className="text-xs text-destructive-foreground hover:underline"
                         >
-                          Delete
+                          {tc('delete')}
                         </button>
                       )}
                     </td>
@@ -301,7 +304,7 @@ export default function RunbooksPage() {
           <div className="relative z-10 w-full max-w-2xl max-h-[90vh] overflow-y-auto bg-card border rounded-lg shadow-xl mx-4">
             <div className="flex items-center justify-between px-6 pt-6 pb-2">
               <h2 className="text-lg font-semibold">
-                {editingId ? 'Edit Runbook' : 'New Runbook'}
+                {editingId ? tc('edit') : t('newRunbook')}
               </h2>
               <button
                 onClick={closeDialog}
@@ -314,7 +317,7 @@ export default function RunbooksPage() {
             <form onSubmit={handleSubmit} className="px-6 pb-6 space-y-4">
               {/* Name */}
               <div>
-                <label className="block text-sm font-medium mb-1">Name</label>
+                <label className="block text-sm font-medium mb-1">{t('form.name')}</label>
                 <input
                   type="text"
                   required
@@ -327,7 +330,7 @@ export default function RunbooksPage() {
 
               {/* Description */}
               <div>
-                <label className="block text-sm font-medium mb-1">Description</label>
+                <label className="block text-sm font-medium mb-1">{t('form.description')}</label>
                 <textarea
                   value={form.description}
                   onChange={(e) => setForm({ ...form, description: e.target.value })}
@@ -339,7 +342,7 @@ export default function RunbooksPage() {
 
               {/* Trigger Type */}
               <div>
-                <label className="block text-sm font-medium mb-1">Trigger Type</label>
+                <label className="block text-sm font-medium mb-1">{t('form.triggerType')}</label>
                 <select
                   value={form.triggerType}
                   onChange={(e) =>
@@ -357,7 +360,7 @@ export default function RunbooksPage() {
 
               {/* Prompt Template */}
               <div>
-                <label className="block text-sm font-medium mb-1">Prompt Template</label>
+                <label className="block text-sm font-medium mb-1">{t('form.promptTemplate')}</label>
                 <textarea
                   value={form.promptTemplate}
                   onChange={(e) => setForm({ ...form, promptTemplate: e.target.value })}
@@ -369,7 +372,7 @@ export default function RunbooksPage() {
 
               {/* Allowed Tools */}
               <div>
-                <label className="block text-sm font-medium mb-1">Allowed Tools</label>
+                <label className="block text-sm font-medium mb-1">{t('form.allowedTools')}</label>
                 <input
                   type="text"
                   value={form.allowedTools}
@@ -382,7 +385,7 @@ export default function RunbooksPage() {
 
               {/* Max Risk Level */}
               <div>
-                <label className="block text-sm font-medium mb-1">Max Risk Level</label>
+                <label className="block text-sm font-medium mb-1">{t('form.maxRiskLevel')}</label>
                 <div className="flex gap-4">
                   {RISK_LEVELS.map((rl) => (
                     <label key={rl.value} className="flex items-center gap-1.5 text-sm cursor-pointer">
@@ -408,7 +411,7 @@ export default function RunbooksPage() {
                     onChange={(e) => setForm({ ...form, autoApprove: e.target.checked })}
                     className="accent-primary h-4 w-4"
                   />
-                  Auto-approve actions within risk level
+                  {t('form.autoApprove')}
                 </label>
               </div>
 
@@ -426,14 +429,14 @@ export default function RunbooksPage() {
                   onClick={closeDialog}
                   className="px-4 py-2 rounded-md border text-sm hover:bg-muted transition-colors"
                 >
-                  Cancel
+                  {tc('cancel')}
                 </button>
                 <button
                   type="submit"
                   disabled={isSaving}
                   className="px-4 py-2 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
                 >
-                  {isSaving ? 'Saving...' : editingId ? 'Update Runbook' : 'Create Runbook'}
+                  {isSaving ? tc('saving') : editingId ? tc('save') : tc('create')}
                 </button>
               </div>
             </form>
diff --git a/it0-web-admin/src/app/(admin)/security/credentials/page.tsx b/it0-web-admin/src/app/(admin)/security/credentials/page.tsx
index 64cc6dd..8f71e26 100644
--- a/it0-web-admin/src/app/(admin)/security/credentials/page.tsx
+++ b/it0-web-admin/src/app/(admin)/security/credentials/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -45,10 +46,10 @@ interface EditFormData {
 // Constants
 // ---------------------------------------------------------------------------
 
-const AUTH_TYPE_LABELS: Record<Credential['authType'], string> = {
-  password: 'Password',
-  ssh_key: 'SSH Key',
-  ssh_key_with_passphrase: 'SSH Key + Passphrase',
+const AUTH_TYPE_LABEL_KEYS: Record<Credential['authType'], string> = {
+  password: 'credentials.authTypes.password',
+  ssh_key: 'credentials.authTypes.sshKey',
+  ssh_key_with_passphrase: 'credentials.authTypes.sshKeyPassphrase',
 };
 
 const EMPTY_FORM: CredentialFormData = {
@@ -71,6 +72,7 @@ const EMPTY_EDIT_FORM: EditFormData = {
 // ---------------------------------------------------------------------------
 
 function AuthTypeBadge({ authType }: { authType: Credential['authType'] }) {
+  const { t } = useTranslation('security');
   const styles: Record<Credential['authType'], string> = {
     password: 'bg-yellow-100 text-yellow-800 dark:bg-yellow-900/30 dark:text-yellow-400',
     ssh_key: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400',
@@ -84,7 +86,7 @@ function AuthTypeBadge({ authType }: { authType: Credential['authType'] }) {
         styles[authType],
       )}
     >
-      {AUTH_TYPE_LABELS[authType]}
+      {t(AUTH_TYPE_LABEL_KEYS[authType])}
     </span>
   );
 }
@@ -110,6 +112,8 @@ function AddCredentialDialog({
   onChange: (field: keyof CredentialFormData, value: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
@@ -119,13 +123,13 @@ function AddCredentialDialog({
 
       {/* dialog */}
       <div className="relative z-10 w-full max-w-lg bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-4">Add Credential</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('credentials.addCredential')}</h2>
 
         <div className="space-y-4 max-h-[70vh] overflow-y-auto pr-1">
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('credentials.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -145,7 +149,7 @@ function AddCredentialDialog({
           {/* username */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Username <span className="text-destructive">*</span>
+              {t('credentials.form.username')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -164,15 +168,15 @@ function AddCredentialDialog({
 
           {/* auth type */}
           <div>
-            <label className="block text-sm font-medium mb-1">Auth Type</label>
+            <label className="block text-sm font-medium mb-1">{t('credentials.form.authType')}</label>
             <select
               value={form.authType}
               onChange={(e) => onChange('authType', e.target.value)}
               className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
             >
-              <option value="password">Password</option>
-              <option value="ssh_key">SSH Key</option>
-              <option value="ssh_key_with_passphrase">SSH Key with Passphrase</option>
+              <option value="password">{t('credentials.authTypes.password')}</option>
+              <option value="ssh_key">{t('credentials.authTypes.sshKey')}</option>
+              <option value="ssh_key_with_passphrase">{t('credentials.authTypes.sshKeyPassphrase')}</option>
             </select>
           </div>
 
@@ -180,7 +184,7 @@ function AddCredentialDialog({
           {form.authType === 'password' && (
             <div>
               <label className="block text-sm font-medium mb-1">
-                Password <span className="text-destructive">*</span>
+                {t('credentials.form.password')} <span className="text-destructive">*</span>
               </label>
               <input
                 type="password"
@@ -202,7 +206,7 @@ function AddCredentialDialog({
           {(form.authType === 'ssh_key' || form.authType === 'ssh_key_with_passphrase') && (
             <div>
               <label className="block text-sm font-medium mb-1">
-                Private Key <span className="text-destructive">*</span>
+                {t('credentials.form.privateKey')} <span className="text-destructive">*</span>
               </label>
               <textarea
                 value={form.privateKey}
@@ -224,7 +228,7 @@ function AddCredentialDialog({
           {form.authType === 'ssh_key_with_passphrase' && (
             <div>
               <label className="block text-sm font-medium mb-1">
-                Passphrase <span className="text-destructive">*</span>
+                {t('credentials.form.passphrase')} <span className="text-destructive">*</span>
               </label>
               <input
                 type="password"
@@ -244,7 +248,7 @@ function AddCredentialDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{tc('description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -263,7 +267,7 @@ function AddCredentialDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -271,7 +275,7 @@ function AddCredentialDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -300,6 +304,8 @@ function EditCredentialDialog({
   onChange: (field: keyof EditFormData, value: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
@@ -309,18 +315,17 @@ function EditCredentialDialog({
 
       {/* dialog */}
       <div className="relative z-10 w-full max-w-lg bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-4">Edit Credential</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('credentials.editCredential')}</h2>
 
         <p className="text-xs text-muted-foreground mb-4 p-3 bg-muted rounded-md">
-          For security reasons, credential values (passwords and private keys) cannot be modified.
-          To change authentication details, delete and recreate the credential.
+          {t('credentials.encryptionWarning')}
         </p>
 
         <div className="space-y-4">
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('credentials.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -339,7 +344,7 @@ function EditCredentialDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{tc('description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -358,7 +363,7 @@ function EditCredentialDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -366,7 +371,7 @@ function EditCredentialDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -393,27 +398,29 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Credential</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('credentials.deleteCredential')}</h2>
         <p className="text-sm text-muted-foreground mb-4">
-          Are you sure you want to delete <strong>{credentialName}</strong>? This action cannot be undone.
+          {tc('confirmDelete')} <strong>{credentialName}</strong>
         </p>
 
         {associatedServers > 0 && (
           <div className="p-3 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-sm text-destructive">
-            <strong>Warning:</strong> This credential is currently associated with{' '}
+            <strong>{tc('warning')}:</strong> This credential is currently associated with{' '}
             <strong>{associatedServers}</strong> server{associatedServers !== 1 ? 's' : ''}.
             Deleting it will remove the credential from those servers and may prevent SSH connections.
           </div>
         )}
 
         <div className="p-3 mb-4 rounded-md bg-muted text-xs text-muted-foreground">
-          Encrypted credential data will be permanently destroyed and cannot be recovered.
+          {t('credentials.encryptionWarning')}
         </div>
 
         <div className="flex justify-end gap-3">
@@ -422,14 +429,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -442,6 +449,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function CredentialsPage() {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -658,16 +667,16 @@ export default function CredentialsPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Credentials</h1>
+          <h1 className="text-2xl font-bold">{t('credentials.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage SSH credentials for server connections
+            {t('credentials.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Credential
+          {t('credentials.addCredential')}
         </button>
       </div>
 
@@ -690,7 +699,7 @@ export default function CredentialsPage() {
             </svg>
           </div>
           <p className="text-sm text-yellow-800 dark:text-yellow-200">
-            Credentials are encrypted with AES-256-GCM. Private keys and passwords are never exposed after creation.
+            {t('credentials.securityNotice')}
           </p>
         </div>
       </div>
@@ -698,14 +707,14 @@ export default function CredentialsPage() {
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load credentials: {(error as Error).message}
+          {t('credentials.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading credentials...
+          {t('credentials.loading')}
         </div>
       )}
 
@@ -716,12 +725,12 @@ export default function CredentialsPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Name</th>
-                  <th className="text-left px-4 py-3 font-medium">Type</th>
-                  <th className="text-left px-4 py-3 font-medium">Username</th>
-                  <th className="text-left px-4 py-3 font-medium">Associated Servers</th>
-                  <th className="text-left px-4 py-3 font-medium">Created</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('credentials.table.name')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('credentials.table.type')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('credentials.table.username')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('credentials.table.associatedServers')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('credentials.table.created')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('credentials.table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -731,7 +740,7 @@ export default function CredentialsPage() {
                       colSpan={6}
                       className="text-center text-muted-foreground py-12"
                     >
-                      No credentials found. Add one to get started.
+                      {t('credentials.empty')}
                     </td>
                   </tr>
                 ) : (
@@ -783,19 +792,19 @@ export default function CredentialsPage() {
                             disabled={testingId === credential.id}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors disabled:opacity-50"
                           >
-                            {testingId === credential.id ? 'Testing...' : 'Test'}
+                            {testingId === credential.id ? 'Testing...' : t('credentials.testCredential')}
                           </button>
                           <button
                             onClick={() => openEdit(credential)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            Edit
+                            {tc('edit')}
                           </button>
                           <button
                             onClick={() => setDeleteTarget(credential)}
                             className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         </div>
                       </td>
diff --git a/it0-web-admin/src/app/(admin)/security/permissions/page.tsx b/it0-web-admin/src/app/(admin)/security/permissions/page.tsx
index d87440b..3754664 100644
--- a/it0-web-admin/src/app/(admin)/security/permissions/page.tsx
+++ b/it0-web-admin/src/app/(admin)/security/permissions/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback, useMemo } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -57,6 +58,7 @@ const ACTION_COLORS: Record<Permission['action'], string> = {
 // ---------------------------------------------------------------------------
 
 function ActionBadge({ action }: { action: Permission['action'] }) {
+  const { t } = useTranslation('security');
   return (
     <span
       className={cn(
@@ -64,7 +66,7 @@ function ActionBadge({ action }: { action: Permission['action'] }) {
         ACTION_COLORS[action],
       )}
     >
-      {action}
+      {t(`permissions.actionTypes.${action}`)}
     </span>
   );
 }
@@ -82,31 +84,33 @@ function PermissionInfoDialog({
   permission: Permission | null;
   onClose: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open || !permission) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-4">Permission Details</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('permissions.detailDialog.title')}</h2>
 
         <dl className="space-y-3">
           <div>
-            <dt className="text-xs text-muted-foreground uppercase tracking-wide">Key</dt>
+            <dt className="text-xs text-muted-foreground uppercase tracking-wide">{t('permissions.detailDialog.key')}</dt>
             <dd className="text-sm font-medium font-mono mt-0.5">{permission.key}</dd>
           </div>
           <div>
-            <dt className="text-xs text-muted-foreground uppercase tracking-wide">Resource</dt>
+            <dt className="text-xs text-muted-foreground uppercase tracking-wide">{t('permissions.detailDialog.resource')}</dt>
             <dd className="text-sm font-medium capitalize mt-0.5">{permission.resource}</dd>
           </div>
           <div>
-            <dt className="text-xs text-muted-foreground uppercase tracking-wide">Action</dt>
+            <dt className="text-xs text-muted-foreground uppercase tracking-wide">{t('permissions.detailDialog.action')}</dt>
             <dd className="mt-0.5">
               <ActionBadge action={permission.action} />
             </dd>
           </div>
           <div>
-            <dt className="text-xs text-muted-foreground uppercase tracking-wide">Description</dt>
+            <dt className="text-xs text-muted-foreground uppercase tracking-wide">{t('permissions.detailDialog.description')}</dt>
             <dd className="text-sm mt-0.5">{permission.description || '--'}</dd>
           </div>
         </dl>
@@ -116,7 +120,7 @@ function PermissionInfoDialog({
             onClick={onClose}
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
           >
-            Close
+            {tc('close')}
           </button>
         </div>
       </div>
@@ -129,6 +133,8 @@ function PermissionInfoDialog({
 // ---------------------------------------------------------------------------
 
 export default function PermissionsPage() {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -223,16 +229,16 @@ export default function PermissionsPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Permissions</h1>
+          <h1 className="text-2xl font-bold">{t('permissions.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            View and manage the permission matrix across roles
+            {t('permissions.subtitle')}
           </p>
         </div>
       </div>
 
       {/* Resource filter */}
       <div className="flex flex-wrap items-center gap-2 mb-6">
-        <span className="text-sm text-muted-foreground">Resource:</span>
+        <span className="text-sm text-muted-foreground">{t('permissions.resource')}:</span>
         <div className="flex gap-1 p-1 bg-muted rounded-lg flex-wrap">
           <button
             onClick={() => setResourceFilter('all')}
@@ -243,7 +249,7 @@ export default function PermissionsPage() {
                 : 'text-muted-foreground hover:text-foreground',
             )}
           >
-            All
+            {tc('all')}
           </button>
           {resources.map((resource) => (
             <button
@@ -265,14 +271,14 @@ export default function PermissionsPage() {
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load permissions: {(error as Error).message}
+          {t('permissions.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading permissions matrix...
+          {t('permissions.loading')}
         </div>
       )}
 
@@ -281,7 +287,7 @@ export default function PermissionsPage() {
         <div className="space-y-6">
           {Object.keys(groupedPermissions).length === 0 ? (
             <div className="text-sm text-muted-foreground py-12 text-center">
-              No permissions found.
+              {t('permissions.empty')}
             </div>
           ) : (
             Object.entries(groupedPermissions).map(([resource, perms]) => (
@@ -294,9 +300,9 @@ export default function PermissionsPage() {
                     <thead>
                       <tr className="border-b bg-muted/30">
                         <th className="text-left px-4 py-3 font-medium min-w-[200px]">
-                          Permission
+                          {t('permissions.permission')}
                         </th>
-                        <th className="text-left px-4 py-3 font-medium">Action</th>
+                        <th className="text-left px-4 py-3 font-medium">{t('permissions.action')}</th>
                         {roles.map((role) => (
                           <th
                             key={role.id}
@@ -362,22 +368,22 @@ export default function PermissionsPage() {
       {/* Summary */}
       {!isLoading && !error && permissions.length > 0 && (
         <div className="mt-6 p-4 bg-muted/30 rounded-lg border">
-          <h3 className="text-sm font-semibold mb-2">Summary</h3>
+          <h3 className="text-sm font-semibold mb-2">{t('permissions.summary.title')}</h3>
           <div className="grid grid-cols-2 sm:grid-cols-4 gap-4">
             <div>
-              <p className="text-xs text-muted-foreground">Total Permissions</p>
+              <p className="text-xs text-muted-foreground">{t('permissions.summary.totalPermissions')}</p>
               <p className="text-lg font-bold">{permissions.length}</p>
             </div>
             <div>
-              <p className="text-xs text-muted-foreground">Total Roles</p>
+              <p className="text-xs text-muted-foreground">{t('permissions.summary.totalRoles')}</p>
               <p className="text-lg font-bold">{roles.length}</p>
             </div>
             <div>
-              <p className="text-xs text-muted-foreground">Resources</p>
+              <p className="text-xs text-muted-foreground">{t('permissions.summary.resources')}</p>
               <p className="text-lg font-bold">{resources.length}</p>
             </div>
             <div>
-              <p className="text-xs text-muted-foreground">Granted</p>
+              <p className="text-xs text-muted-foreground">{t('permissions.summary.granted')}</p>
               <p className="text-lg font-bold">
                 {matrixEntries.filter((e) => e.granted).length}
               </p>
diff --git a/it0-web-admin/src/app/(admin)/security/risk-rules/page.tsx b/it0-web-admin/src/app/(admin)/security/risk-rules/page.tsx
index dec7a43..943fcb0 100644
--- a/it0-web-admin/src/app/(admin)/security/risk-rules/page.tsx
+++ b/it0-web-admin/src/app/(admin)/security/risk-rules/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -44,32 +45,32 @@ type PermissionMatrix = Record<Role, Permission[]>;
 // Constants
 // ---------------------------------------------------------------------------
 
-const RISK_LEVELS: { value: RiskRule['riskLevel']; label: string; color: string }[] = [
-  { value: 0, label: '0 - None', color: 'bg-gray-100 text-gray-800 dark:bg-gray-800/40 dark:text-gray-300' },
-  { value: 1, label: '1 - Low', color: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400' },
-  { value: 2, label: '2 - Medium', color: 'bg-yellow-100 text-yellow-800 dark:bg-yellow-900/30 dark:text-yellow-400' },
-  { value: 3, label: '3 - High', color: 'bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400' },
+const RISK_LEVELS: { value: RiskRule['riskLevel']; labelKey: string; color: string }[] = [
+  { value: 0, labelKey: 'riskRules.riskLevels.0', color: 'bg-gray-100 text-gray-800 dark:bg-gray-800/40 dark:text-gray-300' },
+  { value: 1, labelKey: 'riskRules.riskLevels.1', color: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400' },
+  { value: 2, labelKey: 'riskRules.riskLevels.2', color: 'bg-yellow-100 text-yellow-800 dark:bg-yellow-900/30 dark:text-yellow-400' },
+  { value: 3, labelKey: 'riskRules.riskLevels.3', color: 'bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400' },
 ];
 
-const ACTIONS: { value: RiskRule['action']; label: string }[] = [
-  { value: 'allow', label: 'Allow' },
-  { value: 'block', label: 'Block' },
-  { value: 'require_approval', label: 'Require Approval' },
+const ACTIONS: { value: RiskRule['action']; labelKey: string }[] = [
+  { value: 'allow', labelKey: 'riskRules.actions.allow' },
+  { value: 'block', labelKey: 'riskRules.actions.block' },
+  { value: 'require_approval', labelKey: 'riskRules.actions.requireApproval' },
 ];
 
-const ROLES: { value: Role; label: string }[] = [
-  { value: 'admin', label: 'Admin' },
-  { value: 'operator', label: 'Operator' },
-  { value: 'viewer', label: 'Viewer' },
-  { value: 'readonly', label: 'Read-only' },
+const ROLES: { value: Role; labelKey: string }[] = [
+  { value: 'admin', labelKey: 'permissionMatrix.roles.admin' },
+  { value: 'operator', labelKey: 'permissionMatrix.roles.operator' },
+  { value: 'viewer', labelKey: 'permissionMatrix.roles.viewer' },
+  { value: 'readonly', labelKey: 'permissionMatrix.roles.readonly' },
 ];
 
-const PERMISSIONS: { value: Permission; label: string }[] = [
-  { value: 'manage_servers', label: 'Manage Servers' },
-  { value: 'execute_commands', label: 'Execute Commands' },
-  { value: 'view_audit', label: 'View Audit' },
-  { value: 'manage_users', label: 'Manage Users' },
-  { value: 'approve_commands', label: 'Approve Commands' },
+const PERMISSIONS: { value: Permission; labelKey: string }[] = [
+  { value: 'manage_servers', labelKey: 'permissionMatrix.permissions.manageServers' },
+  { value: 'execute_commands', labelKey: 'permissionMatrix.permissions.executeCommands' },
+  { value: 'view_audit', labelKey: 'permissionMatrix.permissions.viewAudit' },
+  { value: 'manage_users', labelKey: 'permissionMatrix.permissions.manageUsers' },
+  { value: 'approve_commands', labelKey: 'permissionMatrix.permissions.approveCommands' },
 ];
 
 const DEFAULT_MATRIX: PermissionMatrix = {
@@ -109,6 +110,7 @@ function RiskBadge({ level }: { level: RiskRule['riskLevel'] }) {
 // ---------------------------------------------------------------------------
 
 function ActionBadge({ action }: { action: RiskRule['action'] }) {
+  const { t } = useTranslation('security');
   const styles: Record<RiskRule['action'], string> = {
     allow: 'bg-green-100 text-green-800 dark:bg-green-900/30 dark:text-green-400',
     block: 'bg-red-100 text-red-800 dark:bg-red-900/30 dark:text-red-400',
@@ -116,10 +118,10 @@ function ActionBadge({ action }: { action: RiskRule['action'] }) {
       'bg-amber-100 text-amber-800 dark:bg-amber-900/30 dark:text-amber-400',
   };
 
-  const labels: Record<RiskRule['action'], string> = {
-    allow: 'Allow',
-    block: 'Block',
-    require_approval: 'Require Approval',
+  const labelKeys: Record<RiskRule['action'], string> = {
+    allow: 'riskRules.actions.allow',
+    block: 'riskRules.actions.block',
+    require_approval: 'riskRules.actions.requireApproval',
   };
 
   return (
@@ -129,7 +131,7 @@ function ActionBadge({ action }: { action: RiskRule['action'] }) {
         styles[action],
       )}
     >
-      {labels[action]}
+      {t(labelKeys[action])}
     </span>
   );
 }
@@ -157,6 +159,8 @@ function RuleDialog({
   onChange: (field: keyof RiskRuleFormData, value: string | number) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
@@ -170,7 +174,7 @@ function RuleDialog({
           {/* pattern */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Pattern (regex) <span className="text-destructive">*</span>
+              {t('riskRules.form.pattern')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -180,7 +184,7 @@ function RuleDialog({
                 'w-full px-3 py-2 rounded-md border bg-background text-sm font-mono',
                 errors.pattern ? 'border-destructive' : 'border-input',
               )}
-              placeholder="^rm\s+-rf\s+/"
+              placeholder={t('riskRules.form.patternPlaceholder')}
             />
             {errors.pattern && (
               <p className="text-xs text-destructive mt-1">{errors.pattern}</p>
@@ -189,7 +193,7 @@ function RuleDialog({
 
           {/* riskLevel */}
           <div>
-            <label className="block text-sm font-medium mb-1">Risk Level</label>
+            <label className="block text-sm font-medium mb-1">{t('riskRules.form.riskLevel')}</label>
             <select
               value={form.riskLevel}
               onChange={(e) => onChange('riskLevel', parseInt(e.target.value, 10))}
@@ -197,7 +201,7 @@ function RuleDialog({
             >
               {RISK_LEVELS.map((rl) => (
                 <option key={rl.value} value={rl.value}>
-                  {rl.label}
+                  {t(rl.labelKey)}
                 </option>
               ))}
             </select>
@@ -205,7 +209,7 @@ function RuleDialog({
 
           {/* action */}
           <div>
-            <label className="block text-sm font-medium mb-1">Action</label>
+            <label className="block text-sm font-medium mb-1">{t('riskRules.form.action')}</label>
             <select
               value={form.action}
               onChange={(e) => onChange('action', e.target.value)}
@@ -213,7 +217,7 @@ function RuleDialog({
             >
               {ACTIONS.map((a) => (
                 <option key={a.value} value={a.value}>
-                  {a.label}
+                  {t(a.labelKey)}
                 </option>
               ))}
             </select>
@@ -221,7 +225,7 @@ function RuleDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('riskRules.form.description')}</label>
             <input
               type="text"
               value={form.description}
@@ -239,7 +243,7 @@ function RuleDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -247,7 +251,7 @@ function RuleDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -272,16 +276,18 @@ function DeleteRuleDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Rule</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('riskRules.deleteRule')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete the rule with pattern{' '}
-          <code className="px-1 py-0.5 rounded bg-muted font-mono text-xs">{pattern}</code>?
+          {tc('confirmDelete')}{' '}
+          <code className="px-1 py-0.5 rounded bg-muted font-mono text-xs">{pattern}</code>
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -289,14 +295,14 @@ function DeleteRuleDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -319,11 +325,13 @@ function PermissionMatrixSection({
   onToggle: (role: Role, perm: Permission) => void;
   onSave: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   return (
     <div className="border rounded-lg p-6">
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-4">
         <div>
-          <h2 className="text-lg font-semibold">Permission Matrix</h2>
+          <h2 className="text-lg font-semibold">{t('permissionMatrix.title')}</h2>
           <p className="text-sm text-muted-foreground mt-1">
             Configure which roles have access to each permission.
           </p>
@@ -333,7 +341,7 @@ function PermissionMatrixSection({
           disabled={saving}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 whitespace-nowrap"
         >
-          {saving ? 'Saving...' : 'Save Permissions'}
+          {saving ? tc('saving') : t('permissionMatrix.savePermissions')}
         </button>
       </div>
 
@@ -341,10 +349,10 @@ function PermissionMatrixSection({
         <table className="w-full text-sm">
           <thead>
             <tr className="border-b bg-muted/50">
-              <th className="text-left px-4 py-3 font-medium">Role</th>
+              <th className="text-left px-4 py-3 font-medium">{tc('role')}</th>
               {PERMISSIONS.map((perm) => (
                 <th key={perm.value} className="text-center px-3 py-3 font-medium whitespace-nowrap">
-                  {perm.label}
+                  {t(perm.labelKey)}
                 </th>
               ))}
             </tr>
@@ -355,7 +363,7 @@ function PermissionMatrixSection({
                 key={role.value}
                 className="border-b last:border-b-0 hover:bg-muted/30 transition-colors"
               >
-                <td className="px-4 py-3 font-medium capitalize">{role.label}</td>
+                <td className="px-4 py-3 font-medium capitalize">{t(role.labelKey)}</td>
                 {PERMISSIONS.map((perm) => {
                   const checked = (matrix[role.value] ?? []).includes(perm.value);
                   return (
@@ -383,6 +391,8 @@ function PermissionMatrixSection({
 // ---------------------------------------------------------------------------
 
 export default function RiskRulesPage() {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // Risk rules state -----------------------------------------------------
@@ -538,35 +548,35 @@ export default function RiskRulesPage() {
     <div className="space-y-8">
       {/* Header */}
       <div>
-        <h1 className="text-2xl font-bold">Security &amp; Risk Rules</h1>
+        <h1 className="text-2xl font-bold">{t('title')}</h1>
         <p className="text-sm text-muted-foreground mt-1">
-          Configure command risk classification rules and security policies.
+          {t('subtitle')}
         </p>
       </div>
 
       {/* ---- Risk Rules Section ---- */}
       <div>
         <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-4">
-          <h2 className="text-lg font-semibold">Command Risk Rules</h2>
+          <h2 className="text-lg font-semibold">{t('riskRules.title')}</h2>
           <button
             onClick={openAdd}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
           >
-            Add Rule
+            {t('riskRules.addRule')}
           </button>
         </div>
 
         {/* Error state */}
         {rulesError && (
           <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-            Failed to load risk rules: {(rulesError as Error).message}
+            {t('riskRules.loadError')} {(rulesError as Error).message}
           </div>
         )}
 
         {/* Loading */}
         {rulesLoading && (
           <div className="text-sm text-muted-foreground py-12 text-center">
-            Loading risk rules...
+            {t('riskRules.loading')}
           </div>
         )}
 
@@ -577,11 +587,11 @@ export default function RiskRulesPage() {
               <table className="w-full text-sm">
                 <thead>
                   <tr className="border-b bg-muted/50">
-                    <th className="text-left px-4 py-3 font-medium">Pattern</th>
-                    <th className="text-left px-4 py-3 font-medium">Risk Level</th>
-                    <th className="text-left px-4 py-3 font-medium">Action</th>
-                    <th className="text-left px-4 py-3 font-medium">Description</th>
-                    <th className="text-right px-4 py-3 font-medium">Actions</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('riskRules.table.pattern')}</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('riskRules.table.riskLevel')}</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('riskRules.table.action')}</th>
+                    <th className="text-left px-4 py-3 font-medium">{t('riskRules.table.description')}</th>
+                    <th className="text-right px-4 py-3 font-medium">{t('riskRules.table.actions')}</th>
                   </tr>
                 </thead>
                 <tbody>
@@ -591,7 +601,7 @@ export default function RiskRulesPage() {
                         colSpan={5}
                         className="text-center text-muted-foreground py-12"
                       >
-                        No risk rules configured.
+                        {t('riskRules.empty')}
                       </td>
                     </tr>
                   ) : (
@@ -620,13 +630,13 @@ export default function RiskRulesPage() {
                               onClick={() => openEdit(rule)}
                               className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                             >
-                              Edit
+                              {tc('edit')}
                             </button>
                             <button
                               onClick={() => setDeleteTarget(rule)}
                               className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                             >
-                              Delete
+                              {tc('delete')}
                             </button>
                           </div>
                         </td>
@@ -643,7 +653,7 @@ export default function RiskRulesPage() {
       {/* ---- Permission Matrix Section ---- */}
       {matrixLoading ? (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading permissions...
+          {tc('loading')}
         </div>
       ) : (
         <PermissionMatrixSection
@@ -657,7 +667,7 @@ export default function RiskRulesPage() {
       {/* Add / Edit rule dialog */}
       <RuleDialog
         open={dialogOpen}
-        title={editingRule ? 'Edit Rule' : 'Add Rule'}
+        title={editingRule ? t('riskRules.editRule') : t('riskRules.addRule')}
         form={form}
         errors={errors}
         saving={isRuleSaving}
diff --git a/it0-web-admin/src/app/(admin)/security/roles/page.tsx b/it0-web-admin/src/app/(admin)/security/roles/page.tsx
index 442a86f..64852a1 100644
--- a/it0-web-admin/src/app/(admin)/security/roles/page.tsx
+++ b/it0-web-admin/src/app/(admin)/security/roles/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useCallback, useMemo } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -76,6 +77,7 @@ function formatDate(dateStr: string): string {
 // ---------------------------------------------------------------------------
 
 function SystemBadge({ isSystem }: { isSystem: boolean }) {
+  const { t } = useTranslation('security');
   if (!isSystem) return null;
   return (
     <span
@@ -84,7 +86,7 @@ function SystemBadge({ isSystem }: { isSystem: boolean }) {
         'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400',
       )}
     >
-      Built-in
+      {t('roles.builtIn')}
     </span>
   );
 }
@@ -112,6 +114,8 @@ function RoleDialog({
   onChange: (field: keyof RoleFormData, value: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
@@ -125,7 +129,7 @@ function RoleDialog({
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('roles.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -144,7 +148,7 @@ function RoleDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('roles.form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -162,7 +166,7 @@ function RoleDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -170,7 +174,7 @@ function RoleDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -197,20 +201,22 @@ function DeleteRoleDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Role</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('roles.deleteRole')}</h2>
         <p className="text-sm text-muted-foreground mb-4">
-          Are you sure you want to delete <strong>{roleName}</strong>? This action cannot be undone.
+          {tc('confirmDelete')} <strong>{roleName}</strong>
         </p>
 
         {userCount > 0 && (
           <div className="p-3 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-sm text-destructive">
-            <strong>Warning:</strong> This role is currently assigned to{' '}
+            <strong>{tc('warning')}:</strong> This role is currently assigned to{' '}
             <strong>{userCount}</strong> user{userCount !== 1 ? 's' : ''}.
             Those users will lose the permissions granted by this role.
           </div>
@@ -222,14 +228,14 @@ function DeleteRoleDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -254,6 +260,7 @@ function PermissionsPanel({
   saving: boolean;
   onToggle: (roleId: string, permissionId: string, checked: boolean) => void;
 }) {
+  const { t } = useTranslation('security');
   const assignedIds = useMemo(
     () => new Set(rolePermissions.map((p) => p.id)),
     [rolePermissions],
@@ -271,7 +278,7 @@ function PermissionsPanel({
 
   return (
     <div className="px-4 py-4 bg-muted/20">
-      <h3 className="text-sm font-semibold mb-3">Assigned Permissions</h3>
+      <h3 className="text-sm font-semibold mb-3">{t('roles.assignedPermissions')}</h3>
       {Object.keys(grouped).length === 0 ? (
         <p className="text-sm text-muted-foreground">No permissions available.</p>
       ) : (
@@ -313,7 +320,7 @@ function PermissionsPanel({
         </div>
       )}
       {saving && (
-        <p className="text-xs text-muted-foreground mt-2">Saving permissions...</p>
+        <p className="text-xs text-muted-foreground mt-2">{t('roles.savingPermissions')}</p>
       )}
     </div>
   );
@@ -324,6 +331,8 @@ function PermissionsPanel({
 // ---------------------------------------------------------------------------
 
 export default function RolesPage() {
+  const { t } = useTranslation('security');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -492,30 +501,30 @@ export default function RolesPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Roles</h1>
+          <h1 className="text-2xl font-bold">{t('roles.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage roles and their associated permissions
+            {t('roles.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Role
+          {t('roles.addRole')}
         </button>
       </div>
 
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load roles: {(error as Error).message}
+          {t('roles.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading roles...
+          {t('roles.loading')}
         </div>
       )}
 
@@ -526,13 +535,13 @@ export default function RolesPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Name</th>
-                  <th className="text-left px-4 py-3 font-medium">Description</th>
-                  <th className="text-left px-4 py-3 font-medium">Type</th>
-                  <th className="text-right px-4 py-3 font-medium">Permissions</th>
-                  <th className="text-right px-4 py-3 font-medium">Users</th>
-                  <th className="text-left px-4 py-3 font-medium">Created</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('roles.table.name')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('roles.table.description')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('roles.table.type')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('roles.table.permissions')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('roles.table.users')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('roles.table.created')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('roles.table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -542,7 +551,7 @@ export default function RolesPage() {
                       colSpan={7}
                       className="text-center text-muted-foreground py-12"
                     >
-                      No roles found. Add one to get started.
+                      {t('roles.empty')}
                     </td>
                   </tr>
                 ) : (
@@ -562,7 +571,7 @@ export default function RolesPage() {
                           <SystemBadge isSystem={role.isSystem} />
                           {!role.isSystem && (
                             <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-gray-100 text-gray-800 dark:bg-gray-800/40 dark:text-gray-300">
-                              Custom
+                              {t('roles.custom')}
                             </span>
                           )}
                         </td>
@@ -581,20 +590,20 @@ export default function RolesPage() {
                               onClick={() => toggleExpand(role.id)}
                               className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                             >
-                              {expandedRoleId === role.id ? 'Hide Perms' : 'Permissions'}
+                              {expandedRoleId === role.id ? t('roles.hidePerms') : t('roles.showPerms')}
                             </button>
                             <button
                               onClick={() => openEdit(role)}
                               className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                             >
-                              Edit
+                              {tc('edit')}
                             </button>
                             {!role.isSystem && (
                               <button
                                 onClick={() => setDeleteTarget(role)}
                                 className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                               >
-                                Delete
+                                {tc('delete')}
                               </button>
                             )}
                           </div>
@@ -607,7 +616,7 @@ export default function RolesPage() {
                           <td colSpan={7}>
                             {rolePermsLoading ? (
                               <div className="px-4 py-6 text-sm text-muted-foreground text-center">
-                                Loading permissions...
+                                {tc('loading')}
                               </div>
                             ) : (
                               <PermissionsPanel
@@ -633,7 +642,7 @@ export default function RolesPage() {
       {/* Add / Edit role dialog */}
       <RoleDialog
         open={dialogOpen}
-        title={editingRole ? 'Edit Role' : 'Add Role'}
+        title={editingRole ? t('roles.editRole') : t('roles.addRole')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/servers/[id]/page.tsx b/it0-web-admin/src/app/(admin)/servers/[id]/page.tsx
index 4b9bd17..e1193c6 100644
--- a/it0-web-admin/src/app/(admin)/servers/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/servers/[id]/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { useRouter, useParams } from 'next/navigation';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -157,16 +158,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Server</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteServer')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{hostname}</strong>? This action cannot be
-          undone.
+          {t('dialog.deleteConfirm')} <strong>{hostname}</strong>? {t('dialog.deleteWarning')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -174,14 +177,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -235,6 +238,8 @@ function InfoRow({ label, value }: { label: string; value: React.ReactNode }) {
 // ---------------------------------------------------------------------------
 
 export default function ServerDetailPage() {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
@@ -354,8 +359,8 @@ export default function ServerDetailPage() {
 
   const validate = useCallback((): boolean => {
     const next: Partial<Record<keyof ServerFormData, string>> = {};
-    if (!form.hostname.trim()) next.hostname = 'Hostname is required';
-    if (!form.host.trim()) next.host = 'Host is required';
+    if (!form.hostname.trim()) next.hostname = t('validation.hostnameRequired');
+    if (!form.host.trim()) next.host = t('validation.hostRequired');
     setErrors(next);
     return Object.keys(next).length === 0;
   }, [form]);
@@ -401,10 +406,10 @@ export default function ServerDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Servers
+          {t('detail.backToServers')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading server details...
+          {t('detail.loading')}
         </div>
       </div>
     );
@@ -432,10 +437,10 @@ export default function ServerDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Servers
+          {t('detail.backToServers')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load server: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -466,7 +471,7 @@ export default function ServerDetailPage() {
           <path d="M19 12H5" />
           <path d="m12 19-7-7 7-7" />
         </svg>
-        Back to Servers
+        {t('detail.backToServers')}
       </button>
 
       {/* Page header */}
@@ -482,13 +487,13 @@ export default function ServerDetailPage() {
           {/* Server Information Card */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Server Information</h2>
+              <h2 className="text-lg font-semibold">{t('detail.serverInformation')}</h2>
               {!isEditing && (
                 <button
                   onClick={startEditing}
                   className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                 >
-                  Edit
+                  {tc('edit')}
                 </button>
               )}
             </div>
@@ -499,7 +504,7 @@ export default function ServerDetailPage() {
                 {/* hostname */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Hostname <span className="text-destructive">*</span>
+                    {t('form.hostname')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -519,7 +524,7 @@ export default function ServerDetailPage() {
                 {/* host */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Host (IP) <span className="text-destructive">*</span>
+                    {t('form.hostIp')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -538,7 +543,7 @@ export default function ServerDetailPage() {
 
                 {/* sshPort */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">SSH Port</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.sshPort')}</label>
                   <input
                     type="number"
                     value={form.sshPort}
@@ -553,7 +558,7 @@ export default function ServerDetailPage() {
 
                 {/* environment */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Environment</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.environment')}</label>
                   <select
                     value={form.environment}
                     onChange={(e) => handleChange('environment', e.target.value)}
@@ -567,7 +572,7 @@ export default function ServerDetailPage() {
 
                 {/* role */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Role</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.role')}</label>
                   <input
                     type="text"
                     value={form.role}
@@ -579,32 +584,32 @@ export default function ServerDetailPage() {
 
                 {/* tags */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Tags</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.tags')}</label>
                   <input
                     type="text"
                     value={form.tags}
                     onChange={(e) => handleChange('tags', e.target.value)}
                     className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-                    placeholder="linux, ubuntu, docker (comma-separated)"
+                    placeholder={t('form.tagsPlaceholder')}
                   />
                 </div>
 
                 {/* description */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Description</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.description')}</label>
                   <textarea
                     value={form.description}
                     onChange={(e) => handleChange('description', e.target.value)}
                     rows={3}
                     className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm resize-none"
-                    placeholder="Optional description..."
+                    placeholder={t('form.descriptionPlaceholder')}
                   />
                 </div>
 
                 {/* Update error */}
                 {updateMutation.isError && (
                   <div className="p-3 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-                    Failed to update server: {(updateMutation.error as Error).message}
+                    {t('detail.loadError')} {(updateMutation.error as Error).message}
                   </div>
                 )}
 
@@ -616,7 +621,7 @@ export default function ServerDetailPage() {
                     className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
                     disabled={updateMutation.isPending}
                   >
-                    Cancel
+                    {tc('cancel')}
                   </button>
                   <button
                     type="button"
@@ -624,30 +629,30 @@ export default function ServerDetailPage() {
                     disabled={updateMutation.isPending}
                     className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
                   >
-                    {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                    {updateMutation.isPending ? tc('saving') : t('detail.saveChanges')}
                   </button>
                 </div>
               </div>
             ) : (
               /* ---------- Read-only info display ---------- */
               <dl className="divide-y">
-                <InfoRow label="Hostname" value={server.hostname} />
+                <InfoRow label={t('form.hostname')} value={server.hostname} />
                 <InfoRow
-                  label="Host IP"
+                  label={t('form.hostIp')}
                   value={
                     <span className="font-mono text-xs">{server.host}</span>
                   }
                 />
-                <InfoRow label="SSH Port" value={String(server.sshPort)} />
+                <InfoRow label={t('form.sshPort')} value={String(server.sshPort)} />
                 <InfoRow
-                  label="Environment"
+                  label={t('form.environment')}
                   value={
                     <span className="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-muted capitalize">
                       {server.environment}
                     </span>
                   }
                 />
-                <InfoRow label="Role" value={server.role} />
+                <InfoRow label={t('form.role')} value={server.role} />
                 <InfoRow label="OS" value={server.os} />
                 {server.cpuCores != null && (
                   <InfoRow label="CPU Cores" value={String(server.cpuCores)} />
@@ -660,7 +665,7 @@ export default function ServerDetailPage() {
                   <InfoRow label="Cloud Provider" value={server.cloudProvider} />
                 )}
                 <InfoRow
-                  label="Tags"
+                  label={t('form.tags')}
                   value={
                     server.tags && server.tags.length > 0 ? (
                       <div className="flex flex-wrap gap-1.5">
@@ -676,9 +681,9 @@ export default function ServerDetailPage() {
                     ) : null
                   }
                 />
-                <InfoRow label="Description" value={server.description} />
-                <InfoRow label="Created" value={formatDate(server.createdAt)} />
-                <InfoRow label="Updated" value={formatDate(server.updatedAt)} />
+                <InfoRow label={t('form.description')} value={server.description} />
+                <InfoRow label={tc('created')} value={formatDate(server.createdAt)} />
+                <InfoRow label={tc('updated')} value={formatDate(server.updatedAt)} />
               </dl>
             )}
           </div>
@@ -686,13 +691,13 @@ export default function ServerDetailPage() {
           {/* Recent Health Checks */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Recent Health Checks</h2>
+              <h2 className="text-lg font-semibold">{t('detail.recentHealthChecks')}</h2>
               <button
                 onClick={() => runHealthCheckMutation.mutate()}
                 disabled={runHealthCheckMutation.isPending}
                 className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors disabled:opacity-50"
               >
-                {runHealthCheckMutation.isPending ? 'Running...' : 'Run Now'}
+                {runHealthCheckMutation.isPending ? tc('running') : t('detail.runHealthCheck')}
               </button>
             </div>
 
@@ -710,17 +715,17 @@ export default function ServerDetailPage() {
 
             {healthChecks.length === 0 ? (
               <p className="text-sm text-muted-foreground py-4 text-center">
-                No health checks recorded yet.
+                {t('detail.noHealthChecks')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Status</th>
-                      <th className="text-left px-3 py-2 font-medium">Latency</th>
-                      <th className="text-left px-3 py-2 font-medium">Message</th>
-                      <th className="text-right px-3 py-2 font-medium">Time</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.healthCheckTable.status')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.healthCheckTable.latency')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.healthCheckTable.message')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('detail.healthCheckTable.time')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -751,21 +756,21 @@ export default function ServerDetailPage() {
 
           {/* Recent Commands */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Recent Commands</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.recentCommands')}</h2>
 
             {recentCommands.length === 0 ? (
               <p className="text-sm text-muted-foreground py-4 text-center">
-                No commands executed on this server yet.
+                {t('detail.noCommands')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Command</th>
-                      <th className="text-left px-3 py-2 font-medium">Exit Code</th>
-                      <th className="text-left px-3 py-2 font-medium">Risk</th>
-                      <th className="text-right px-3 py-2 font-medium">Time</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.commandsTable.command')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.commandsTable.exitCode')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.commandsTable.risk')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('detail.commandsTable.time')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -812,7 +817,7 @@ export default function ServerDetailPage() {
         <div className="space-y-6">
           {/* Quick Actions */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.quickActions')}</h2>
             <div className="space-y-2">
               <button
                 onClick={() => router.push(`/terminal?serverId=${server.id}`)}
@@ -832,7 +837,7 @@ export default function ServerDetailPage() {
                   <polyline points="4 17 10 11 4 5" />
                   <line x1="12" x2="20" y1="19" y2="19" />
                 </svg>
-                Open Terminal
+                {t('detail.openTerminal')}
               </button>
               <button
                 onClick={() => runHealthCheckMutation.mutate()}
@@ -852,7 +857,7 @@ export default function ServerDetailPage() {
                 >
                   <path d="M22 12h-4l-3 9L9 3l-3 9H2" />
                 </svg>
-                {runHealthCheckMutation.isPending ? 'Running...' : 'Run Health Check'}
+                {runHealthCheckMutation.isPending ? tc('running') : t('detail.runHealthCheck')}
               </button>
               <button
                 onClick={startEditing}
@@ -872,7 +877,7 @@ export default function ServerDetailPage() {
                   <path d="M17 3a2.85 2.83 0 1 1 4 4L7.5 20.5 2 22l1.5-5.5Z" />
                   <path d="m15 5 4 4" />
                 </svg>
-                Edit Server
+                {t('detail.editServer')}
               </button>
               <button
                 onClick={() => setDeleteOpen(true)}
@@ -895,14 +900,14 @@ export default function ServerDetailPage() {
                   <line x1="10" x2="10" y1="11" y2="17" />
                   <line x1="14" x2="14" y1="11" y2="17" />
                 </svg>
-                Delete Server
+                {t('detail.deleteServer')}
               </button>
             </div>
           </div>
 
           {/* Connection Info */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Connection Info</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.connectionInfo')}</h2>
             <div className="space-y-3">
               <div>
                 <p className="text-sm text-muted-foreground mb-1">SSH Connection</p>
@@ -942,7 +947,7 @@ export default function ServerDetailPage() {
 
           {/* Tags */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Tags</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.tags')}</h2>
             {server.tags && server.tags.length > 0 ? (
               <div className="flex flex-wrap gap-2">
                 {server.tags.map((tag) => (
@@ -955,7 +960,7 @@ export default function ServerDetailPage() {
                 ))}
               </div>
             ) : (
-              <p className="text-sm text-muted-foreground">No tags assigned.</p>
+              <p className="text-sm text-muted-foreground">{t('detail.noTags')}</p>
             )}
           </div>
         </div>
diff --git a/it0-web-admin/src/app/(admin)/servers/clusters/page.tsx b/it0-web-admin/src/app/(admin)/servers/clusters/page.tsx
index 23f6286..2a66d81 100644
--- a/it0-web-admin/src/app/(admin)/servers/clusters/page.tsx
+++ b/it0-web-admin/src/app/(admin)/servers/clusters/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -95,29 +96,31 @@ function HealthSummary({
 }: {
   summary: Cluster['healthySummary'];
 }) {
-  const parts: { count: number; label: string; color: string }[] = [];
+  const { t } = useTranslation('servers');
+
+  const parts: { count: number; labelKey: string; color: string }[] = [];
   if (summary.online > 0) {
-    parts.push({ count: summary.online, label: 'online', color: 'bg-green-500' });
+    parts.push({ count: summary.online, labelKey: 'clusters.health.online', color: 'bg-green-500' });
   }
   if (summary.offline > 0) {
-    parts.push({ count: summary.offline, label: 'offline', color: 'bg-red-500' });
+    parts.push({ count: summary.offline, labelKey: 'clusters.health.offline', color: 'bg-red-500' });
   }
   if (summary.maintenance > 0) {
-    parts.push({ count: summary.maintenance, label: 'maintenance', color: 'bg-yellow-500' });
+    parts.push({ count: summary.maintenance, labelKey: 'clusters.health.maintenance', color: 'bg-yellow-500' });
   }
 
   if (parts.length === 0) {
     return (
-      <span className="text-xs text-muted-foreground">No servers</span>
+      <span className="text-xs text-muted-foreground">{t('clusters.health.noServers')}</span>
     );
   }
 
   return (
     <div className="flex items-center gap-3">
       {parts.map((part) => (
-        <span key={part.label} className="inline-flex items-center gap-1 text-xs text-muted-foreground">
+        <span key={part.labelKey} className="inline-flex items-center gap-1 text-xs text-muted-foreground">
           <span className={cn('w-2 h-2 rounded-full', part.color)} />
-          {part.count} {part.label}
+          {part.count} {t(part.labelKey)}
         </span>
       ))}
     </div>
@@ -153,6 +156,9 @@ function ClusterDialog({
   onToggleServer: (serverId: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
@@ -168,7 +174,7 @@ function ClusterDialog({
           {/* name */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Name <span className="text-destructive">*</span>
+              {t('clusters.form.name')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -187,7 +193,7 @@ function ClusterDialog({
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('clusters.form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
@@ -199,7 +205,7 @@ function ClusterDialog({
 
           {/* environment */}
           <div>
-            <label className="block text-sm font-medium mb-1">Environment</label>
+            <label className="block text-sm font-medium mb-1">{t('clusters.form.environment')}</label>
             <select
               value={form.environment}
               onChange={(e) => onChange('environment', e.target.value)}
@@ -213,7 +219,7 @@ function ClusterDialog({
 
           {/* tags */}
           <div>
-            <label className="block text-sm font-medium mb-1">Tags</label>
+            <label className="block text-sm font-medium mb-1">{t('clusters.form.tags')}</label>
             <input
               type="text"
               value={form.tags}
@@ -225,14 +231,14 @@ function ClusterDialog({
 
           {/* server selection */}
           <div>
-            <label className="block text-sm font-medium mb-1">Servers</label>
+            <label className="block text-sm font-medium mb-1">{t('clusters.form.servers')}</label>
             {serversLoading ? (
               <div className="text-xs text-muted-foreground py-4 text-center">
-                Loading servers...
+                {tc('loading')}
               </div>
             ) : servers.length === 0 ? (
               <div className="text-xs text-muted-foreground py-4 text-center">
-                No servers available.
+                {tc('noData')}
               </div>
             ) : (
               <div className="max-h-[200px] overflow-y-auto border border-input rounded-md">
@@ -283,7 +289,7 @@ function ClusterDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -291,7 +297,7 @@ function ClusterDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -316,16 +322,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Cluster</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('clusters.deleteCluster')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{clusterName}</strong>? This action cannot be
-          undone.
+          {t('dialog.deleteConfirm')} <strong>{clusterName}</strong>? {t('dialog.deleteWarning')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -333,14 +341,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -353,6 +361,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function ClustersPage() {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -410,7 +420,7 @@ export default function ClustersPage() {
   // Helpers --------------------------------------------------------------
   const validate = useCallback((): boolean => {
     const next: Partial<Record<keyof ClusterFormData, string>> = {};
-    if (!form.name.trim()) next.name = 'Name is required';
+    if (!form.name.trim()) next.name = t('validation.hostnameRequired');
     setErrors(next);
     return Object.keys(next).length === 0;
   }, [form]);
@@ -494,38 +504,38 @@ export default function ClustersPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Clusters</h1>
+          <h1 className="text-2xl font-bold">{t('clusters.title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Organize servers into logical groups
+            {t('clusters.subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Cluster
+          {t('clusters.addCluster')}
         </button>
       </div>
 
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load clusters: {(error as Error).message}
+          {t('clusters.loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading clusters...
+          {t('clusters.loading')}
         </div>
       )}
 
       {/* Empty state */}
       {!isLoading && !error && clusters.length === 0 && (
         <div className="text-center py-12 text-muted-foreground">
-          <p className="text-sm">No clusters found.</p>
-          <p className="text-xs mt-1">Create your first cluster to organize servers into logical groups.</p>
+          <p className="text-sm">{t('clusters.empty')}</p>
+          <p className="text-xs mt-1">{t('clusters.subtitle')}</p>
         </div>
       )}
 
@@ -582,13 +592,13 @@ export default function ClustersPage() {
                   onClick={() => openEdit(cluster)}
                   className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                 >
-                  Edit
+                  {tc('edit')}
                 </button>
                 <button
                   onClick={() => setDeleteTarget(cluster)}
                   className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                 >
-                  Delete
+                  {tc('delete')}
                 </button>
               </div>
             </div>
@@ -599,7 +609,7 @@ export default function ClustersPage() {
       {/* Add / Edit dialog */}
       <ClusterDialog
         open={dialogOpen}
-        title={editingCluster ? 'Edit Cluster' : 'Add Cluster'}
+        title={editingCluster ? t('clusters.editCluster') : t('clusters.addCluster')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/servers/page.tsx b/it0-web-admin/src/app/(admin)/servers/page.tsx
index 12258c6..44f0273 100644
--- a/it0-web-admin/src/app/(admin)/servers/page.tsx
+++ b/it0-web-admin/src/app/(admin)/servers/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -43,12 +44,7 @@ type EnvironmentFilter = 'all' | 'dev' | 'staging' | 'prod';
 // Constants
 // ---------------------------------------------------------------------------
 
-const ENVIRONMENTS: { label: string; value: EnvironmentFilter }[] = [
-  { label: 'All', value: 'all' },
-  { label: 'Dev', value: 'dev' },
-  { label: 'Staging', value: 'staging' },
-  { label: 'Prod', value: 'prod' },
-];
+const ENVIRONMENT_VALUES: EnvironmentFilter[] = ['all', 'dev', 'staging', 'prod'];
 
 const EMPTY_FORM: ServerFormData = {
   hostname: '',
@@ -106,6 +102,9 @@ function ServerDialog({
   onChange: (field: keyof ServerFormData, value: string | number) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
@@ -121,7 +120,7 @@ function ServerDialog({
           {/* hostname */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Hostname <span className="text-destructive">*</span>
+              {t('form.hostname')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -141,7 +140,7 @@ function ServerDialog({
           {/* host */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Host (IP) <span className="text-destructive">*</span>
+              {t('form.hostIp')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -160,7 +159,7 @@ function ServerDialog({
 
           {/* sshPort */}
           <div>
-            <label className="block text-sm font-medium mb-1">SSH Port</label>
+            <label className="block text-sm font-medium mb-1">{t('form.sshPort')}</label>
             <input
               type="number"
               value={form.sshPort}
@@ -173,7 +172,7 @@ function ServerDialog({
 
           {/* environment */}
           <div>
-            <label className="block text-sm font-medium mb-1">Environment</label>
+            <label className="block text-sm font-medium mb-1">{t('form.environment')}</label>
             <select
               value={form.environment}
               onChange={(e) => onChange('environment', e.target.value)}
@@ -187,7 +186,7 @@ function ServerDialog({
 
           {/* role */}
           <div>
-            <label className="block text-sm font-medium mb-1">Role</label>
+            <label className="block text-sm font-medium mb-1">{t('form.role')}</label>
             <input
               type="text"
               value={form.role}
@@ -199,25 +198,25 @@ function ServerDialog({
 
           {/* tags */}
           <div>
-            <label className="block text-sm font-medium mb-1">Tags</label>
+            <label className="block text-sm font-medium mb-1">{t('form.tags')}</label>
             <input
               type="text"
               value={form.tags}
               onChange={(e) => onChange('tags', e.target.value)}
               className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-              placeholder="linux, ubuntu, docker (comma-separated)"
+              placeholder={t('form.tagsPlaceholder')}
             />
           </div>
 
           {/* description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{t('form.description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => onChange('description', e.target.value)}
               rows={3}
               className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm resize-none"
-              placeholder="Optional description..."
+              placeholder={t('form.descriptionPlaceholder')}
             />
           </div>
         </div>
@@ -230,7 +229,7 @@ function ServerDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -238,7 +237,7 @@ function ServerDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -263,15 +262,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Server</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteServer')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{hostname}</strong>? This action cannot be undone.
+          {t('dialog.deleteConfirm')} <strong>{hostname}</strong>? {t('dialog.deleteWarning')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -279,14 +281,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -299,6 +301,8 @@ function DeleteDialog({
 // ---------------------------------------------------------------------------
 
 export default function ServersPage() {
+  const { t } = useTranslation('servers');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   // State ----------------------------------------------------------------
@@ -353,8 +357,8 @@ export default function ServersPage() {
   // Helpers --------------------------------------------------------------
   const validate = useCallback((): boolean => {
     const next: Partial<Record<keyof ServerFormData, string>> = {};
-    if (!form.hostname.trim()) next.hostname = 'Hostname is required';
-    if (!form.host.trim()) next.host = 'Host is required';
+    if (!form.hostname.trim()) next.hostname = t('validation.hostnameRequired');
+    if (!form.host.trim()) next.host = t('validation.hostRequired');
     setErrors(next);
     return Object.keys(next).length === 0;
   }, [form]);
@@ -430,33 +434,33 @@ export default function ServersPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Servers</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage server inventory, clusters, and SSH configurations.
+            {t('subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add Server
+          {t('addServer')}
         </button>
       </div>
 
       {/* Environment filter tabs */}
       <div className="flex gap-1 mb-6 p-1 bg-muted rounded-lg w-fit">
-        {ENVIRONMENTS.map((env) => (
+        {ENVIRONMENT_VALUES.map((env) => (
           <button
-            key={env.value}
-            onClick={() => setEnvFilter(env.value)}
+            key={env}
+            onClick={() => setEnvFilter(env)}
             className={cn(
               'px-4 py-1.5 text-sm rounded-md font-medium transition-colors',
-              envFilter === env.value
+              envFilter === env
                 ? 'bg-background text-foreground shadow-sm'
                 : 'text-muted-foreground hover:text-foreground',
             )}
           >
-            {env.label}
+            {t(`filters.${env}`)}
           </button>
         ))}
       </div>
@@ -464,14 +468,14 @@ export default function ServersPage() {
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load servers: {(error as Error).message}
+          {t('loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading servers...
+          {t('loading')}
         </div>
       )}
 
@@ -482,12 +486,12 @@ export default function ServersPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Hostname</th>
-                  <th className="text-left px-4 py-3 font-medium">Host</th>
-                  <th className="text-left px-4 py-3 font-medium">Environment</th>
-                  <th className="text-left px-4 py-3 font-medium">Role</th>
-                  <th className="text-left px-4 py-3 font-medium">Status</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.hostname')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.host')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.environment')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.role')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.status')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -497,7 +501,7 @@ export default function ServersPage() {
                       colSpan={6}
                       className="text-center text-muted-foreground py-12"
                     >
-                      No servers found.
+                      {t('empty')}
                     </td>
                   </tr>
                 ) : (
@@ -525,13 +529,13 @@ export default function ServersPage() {
                             onClick={() => openEdit(server)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            Edit
+                            {tc('edit')}
                           </button>
                           <button
                             onClick={() => setDeleteTarget(server)}
                             className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         </div>
                       </td>
@@ -547,7 +551,7 @@ export default function ServersPage() {
       {/* Add / Edit dialog */}
       <ServerDialog
         open={dialogOpen}
-        title={editingServer ? 'Edit Server' : 'Add Server'}
+        title={editingServer ? t('editServer') : t('addServer')}
         form={form}
         errors={errors}
         saving={isSaving}
diff --git a/it0-web-admin/src/app/(admin)/sessions/[id]/page.tsx b/it0-web-admin/src/app/(admin)/sessions/[id]/page.tsx
index 23fb4c1..9876f53 100644
--- a/it0-web-admin/src/app/(admin)/sessions/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/sessions/[id]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback, useEffect, useRef } from 'react';
 import { useQuery, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -61,11 +62,6 @@ const ENGINE_STYLES: Record<SessionDetail['engineType'], string> = {
   claude_api: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400',
 };
 
-const ENGINE_LABELS: Record<SessionDetail['engineType'], string> = {
-  claude_code_cli: 'Claude Code CLI',
-  claude_api: 'Claude API',
-};
-
 const EVENT_TYPE_STYLES: Record<SessionEvent['type'], string> = {
   assistant: 'bg-blue-100 text-blue-800 dark:bg-blue-900/30 dark:text-blue-400',
   tool_use: 'bg-purple-100 text-purple-800 dark:bg-purple-900/30 dark:text-purple-400',
@@ -99,6 +95,12 @@ function StatusBadge({ status }: { status: SessionDetail['status'] }) {
 }
 
 function EngineBadge({ engine }: { engine: SessionDetail['engineType'] }) {
+  const { t } = useTranslation('sessions');
+  const ENGINE_LABELS: Record<SessionDetail['engineType'], string> = {
+    claude_code_cli: t('detail.engines.claudeCli'),
+    claude_api: t('detail.engines.claudeApi'),
+  };
+
   return (
     <span
       className={cn(
@@ -236,6 +238,8 @@ function InfoRow({ label, value }: { label: string; value: React.ReactNode }) {
 // ---------------------------------------------------------------------------
 
 export default function SessionDetailPage() {
+  const { t } = useTranslation('sessions');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
@@ -318,10 +322,10 @@ export default function SessionDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Sessions
+          {t('detail.backToSessions')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading session details...
+          {t('detail.loading')}
         </div>
       </div>
     );
@@ -349,10 +353,10 @@ export default function SessionDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Sessions
+          {t('detail.backToSessions')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load session: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -381,13 +385,13 @@ export default function SessionDetailPage() {
           <path d="M19 12H5" />
           <path d="m12 19-7-7 7-7" />
         </svg>
-        Back to Sessions
+        {t('detail.backToSessions')}
       </button>
 
       {/* Page header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div className="flex items-center gap-3">
-          <h1 className="text-2xl font-bold">Session</h1>
+          <h1 className="text-2xl font-bold">{t('detail.title')}</h1>
           <StatusBadge status={session.status} />
           <EngineBadge engine={session.engineType} />
         </div>
@@ -402,33 +406,33 @@ export default function SessionDetailPage() {
         <div className="lg:col-span-2 space-y-6">
           {/* Session Information Card */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Session Information</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.sessionInformation')}</h2>
             <dl className="divide-y">
               <InfoRow
-                label="Session ID"
+                label={t('detail.info.sessionId')}
                 value={
                   <code className="font-mono text-xs">{session.id}</code>
                 }
               />
               <InfoRow
-                label="Status"
+                label={t('detail.info.status')}
                 value={<StatusBadge status={session.status} />}
               />
               <InfoRow
-                label="Engine"
+                label={t('detail.info.engine')}
                 value={<EngineBadge engine={session.engineType} />}
               />
-              <InfoRow label="Started At" value={formatDate(session.startedAt)} />
+              <InfoRow label={t('detail.info.startedAt')} value={formatDate(session.startedAt)} />
               <InfoRow
-                label="Ended At"
-                value={session.endedAt ? formatDate(session.endedAt) : 'In progress...'}
+                label={t('detail.info.endedAt')}
+                value={session.endedAt ? formatDate(session.endedAt) : t('detail.inProgressDuration')}
               />
               <InfoRow
-                label="Duration"
+                label={t('detail.info.duration')}
                 value={formatDuration(session.startedAt, session.endedAt)}
               />
               <InfoRow
-                label="Token Count"
+                label={t('detail.info.tokenCount')}
                 value={
                   <span className="tabular-nums">
                     {session.tokenCount.toLocaleString()}
@@ -436,7 +440,7 @@ export default function SessionDetailPage() {
                 }
               />
               <InfoRow
-                label="Total Cost"
+                label={t('detail.info.totalCost')}
                 value={
                   <span className="tabular-nums">
                     {formatCurrency(session.totalCostUsd)}
@@ -444,7 +448,7 @@ export default function SessionDetailPage() {
                 }
               />
               {session.taskDescription && (
-                <InfoRow label="Task" value={session.taskDescription} />
+                <InfoRow label={t('detail.info.task')} value={session.taskDescription} />
               )}
             </dl>
           </div>
@@ -453,7 +457,7 @@ export default function SessionDetailPage() {
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
               <h2 className="text-lg font-semibold">
-                Event Stream
+                {t('detail.eventStream')}
                 <span className="text-sm font-normal text-muted-foreground ml-2">
                   ({events.length} events)
                 </span>
@@ -461,13 +465,13 @@ export default function SessionDetailPage() {
               <ToggleSwitch
                 checked={autoScroll}
                 onChange={setAutoScroll}
-                label="Auto-scroll"
+                label={t('detail.autoScroll')}
               />
             </div>
 
             {events.length === 0 ? (
               <p className="text-sm text-muted-foreground py-8 text-center">
-                No events recorded yet.
+                {t('detail.noEvents')}
               </p>
             ) : (
               <div className="max-h-[600px] overflow-y-auto space-y-1">
@@ -528,7 +532,7 @@ export default function SessionDetailPage() {
                   <span className="animate-ping absolute inline-flex h-full w-full rounded-full bg-blue-400 opacity-75" />
                   <span className="relative inline-flex rounded-full h-2 w-2 bg-blue-500" />
                 </span>
-                Live -- streaming events...
+                {t('detail.liveStreaming')}
               </div>
             )}
           </div>
@@ -538,36 +542,36 @@ export default function SessionDetailPage() {
         <div className="space-y-6">
           {/* Session Stats */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Statistics</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.statistics')}</h2>
             <div className="space-y-4">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Status</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.status')}</span>
                 <StatusBadge status={session.status} />
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Engine</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.engine')}</span>
                 <EngineBadge engine={session.engineType} />
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Duration</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.duration')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {formatDuration(session.startedAt, session.endedAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Tokens</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.tokenCount')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {session.tokenCount.toLocaleString()}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Cost</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.totalCost')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {formatCurrency(session.totalCostUsd)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Events</span>
+                <span className="text-sm text-muted-foreground">{t('detail.eventStream')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {events.length}
                 </span>
@@ -577,10 +581,10 @@ export default function SessionDetailPage() {
 
           {/* Tasks */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Tasks</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.tasks')}</h2>
             {tasks.length === 0 ? (
               <p className="text-sm text-muted-foreground text-center py-4">
-                No tasks in this session.
+                {t('detail.noTasks')}
               </p>
             ) : (
               <div className="space-y-2">
@@ -605,7 +609,7 @@ export default function SessionDetailPage() {
           {/* Server Targets */}
           {session.serverTargets && session.serverTargets.length > 0 && (
             <div className="bg-card border rounded-lg p-6">
-              <h2 className="text-lg font-semibold mb-4">Server Targets</h2>
+              <h2 className="text-lg font-semibold mb-4">{t('detail.serverTargets')}</h2>
               <div className="flex flex-wrap gap-2">
                 {session.serverTargets.map((server) => (
                   <span
@@ -621,18 +625,18 @@ export default function SessionDetailPage() {
 
           {/* Timestamps */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Timestamps</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.timestamps')}</h2>
             <div className="space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Started</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.startedAt')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(session.startedAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Ended</span>
+                <span className="text-sm text-muted-foreground">{t('detail.info.endedAt')}</span>
                 <span className="text-xs text-muted-foreground">
-                  {session.endedAt ? formatDate(session.endedAt) : 'In progress'}
+                  {session.endedAt ? formatDate(session.endedAt) : t('detail.inProgressStatus')}
                 </span>
               </div>
             </div>
diff --git a/it0-web-admin/src/app/(admin)/settings/page.tsx b/it0-web-admin/src/app/(admin)/settings/page.tsx
index c4b6602..25a01a6 100644
--- a/it0-web-admin/src/app/(admin)/settings/page.tsx
+++ b/it0-web-admin/src/app/(admin)/settings/page.tsx
@@ -2,9 +2,11 @@
 
 import { useState } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { format } from 'date-fns';
+import { useLocaleStore, type SupportedLocale } from '@/stores/zustand/locale-store';
 
 /* ------------------------------------------------------------------ */
 /*  Types                                                              */
@@ -48,13 +50,7 @@ interface AccountInfo {
 
 type SectionId = 'general' | 'notifications' | 'apikeys' | 'theme' | 'account';
 
-const SECTIONS: { id: SectionId; label: string }[] = [
-  { id: 'general', label: 'General' },
-  { id: 'notifications', label: 'Notifications' },
-  { id: 'apikeys', label: 'API Keys' },
-  { id: 'theme', label: 'Theme' },
-  { id: 'account', label: 'Account' },
-];
+const SECTION_IDS: SectionId[] = ['general', 'notifications', 'apikeys', 'theme', 'account'];
 
 const TIMEZONES = [
   'UTC', 'America/New_York', 'America/Chicago', 'America/Denver',
@@ -63,15 +59,13 @@ const TIMEZONES = [
   'Australia/Sydney',
 ];
 
-const LANGUAGES = [
-  { value: 'en', label: 'English' },
-  { value: 'ko', label: 'Korean' },
-  { value: 'ja', label: 'Japanese' },
-  { value: 'zh', label: 'Chinese' },
-  { value: 'de', label: 'German' },
-  { value: 'fr', label: 'French' },
+const UI_LANGUAGES: { value: SupportedLocale; labelKey: string }[] = [
+  { value: 'en', labelKey: 'languages.en' },
+  { value: 'zh', labelKey: 'languages.zh' },
 ];
 
+const PLATFORM_LANGUAGES = ['en', 'ko', 'ja', 'zh', 'de', 'fr'];
+
 const ESCALATION_POLICIES = ['immediate', 'after-5-min', 'after-15-min', 'after-30-min', 'manual'];
 
 const COLOR_PRESETS = [
@@ -84,30 +78,31 @@ const COLOR_PRESETS = [
 /* ------------------------------------------------------------------ */
 
 export default function SettingsPage() {
+  const { t } = useTranslation('settings');
   const [activeSection, setActiveSection] = useState<SectionId>('general');
 
   return (
     <div>
-      <h1 className="text-2xl font-bold mb-1">Settings</h1>
+      <h1 className="text-2xl font-bold mb-1">{t('title')}</h1>
       <p className="text-sm text-muted-foreground mb-6">
-        Application preferences and configurations.
+        {t('subtitle')}
       </p>
 
       <div className="flex gap-6">
         {/* ---- Section Nav ---- */}
         <nav className="w-48 shrink-0">
           <ul className="space-y-1">
-            {SECTIONS.map((s) => (
-              <li key={s.id}>
+            {SECTION_IDS.map((id) => (
+              <li key={id}>
                 <button
-                  onClick={() => setActiveSection(s.id)}
+                  onClick={() => setActiveSection(id)}
                   className={`w-full text-left px-3 py-2 rounded-md text-sm font-medium transition-colors ${
-                    activeSection === s.id
+                    activeSection === id
                       ? 'bg-primary text-primary-foreground'
                       : 'hover:bg-muted text-muted-foreground'
                   }`}
                 >
-                  {s.label}
+                  {t(`sections.${id}`)}
                 </button>
               </li>
             ))}
@@ -132,7 +127,10 @@ export default function SettingsPage() {
 /* ------------------------------------------------------------------ */
 
 function GeneralSection() {
+  const { t } = useTranslation('settings');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
+  const { locale, setLocale } = useLocaleStore();
 
   const { data, isLoading } = useQuery<PlatformSettings>({
     queryKey: queryKeys.settings.general(),
@@ -160,24 +158,41 @@ function GeneralSection() {
 
   return (
     <div className="bg-card border rounded-lg p-6">
-      <h2 className="text-lg font-semibold mb-4">General Settings</h2>
+      <h2 className="text-lg font-semibold mb-4">{t('general.title')}</h2>
 
       {isLoading ? (
-        <p className="text-muted-foreground text-sm">Loading...</p>
+        <p className="text-muted-foreground text-sm">{tc('loading')}</p>
       ) : (
         <div className="space-y-4 max-w-lg">
+          {/* UI Language selector */}
           <div>
-            <label className="block text-sm font-medium mb-1">Platform Name</label>
+            <label className="block text-sm font-medium mb-1">{t('general.uiLanguage')}</label>
+            <select
+              className="w-full border rounded-md px-3 py-2 bg-background text-sm"
+              value={locale}
+              onChange={(e) => setLocale(e.target.value as SupportedLocale)}
+            >
+              {UI_LANGUAGES.map((l) => (
+                <option key={l.value} value={l.value}>{t(l.labelKey)}</option>
+              ))}
+            </select>
+            <p className="text-xs text-muted-foreground mt-1">
+              {t('general.uiLanguageHint')}
+            </p>
+          </div>
+
+          <div>
+            <label className="block text-sm font-medium mb-1">{t('general.platformName')}</label>
             <input
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
               value={form.platformName}
               onChange={(e) => setForm({ ...form, platformName: e.target.value })}
-              placeholder="IT0 Platform"
+              placeholder={t('general.platformNamePlaceholder')}
             />
           </div>
 
           <div>
-            <label className="block text-sm font-medium mb-1">Default Timezone</label>
+            <label className="block text-sm font-medium mb-1">{t('general.defaultTimezone')}</label>
             <select
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
               value={form.defaultTimezone}
@@ -190,21 +205,21 @@ function GeneralSection() {
           </div>
 
           <div>
-            <label className="block text-sm font-medium mb-1">Default Language</label>
+            <label className="block text-sm font-medium mb-1">{t('general.defaultLanguage')}</label>
             <select
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
               value={form.defaultLanguage}
               onChange={(e) => setForm({ ...form, defaultLanguage: e.target.value })}
             >
-              {LANGUAGES.map((l) => (
-                <option key={l.value} value={l.value}>{l.label}</option>
+              {PLATFORM_LANGUAGES.map((code) => (
+                <option key={code} value={code}>{t(`languages.${code}`)}</option>
               ))}
             </select>
           </div>
 
           <div>
             <label className="block text-sm font-medium mb-1">
-              Auto-Approve Threshold (Risk Level 0-3)
+              {t('general.autoApproveThreshold')}
             </label>
             <input
               type="number"
@@ -217,7 +232,7 @@ function GeneralSection() {
               }
             />
             <p className="text-xs text-muted-foreground mt-1">
-              Operations at or below this risk level will be auto-approved.
+              {t('general.autoApproveHint')}
             </p>
           </div>
 
@@ -226,14 +241,14 @@ function GeneralSection() {
             disabled={mutation.isPending}
             className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50"
           >
-            {mutation.isPending ? 'Saving...' : 'Save Changes'}
+            {mutation.isPending ? tc('saving') : tc('save')}
           </button>
 
           {mutation.isError && (
             <p className="text-sm text-red-500">{(mutation.error as Error).message}</p>
           )}
           {mutation.isSuccess && (
-            <p className="text-sm text-green-600">Settings saved successfully.</p>
+            <p className="text-sm text-green-600">{t('general.saved')}</p>
           )}
         </div>
       )}
@@ -246,6 +261,8 @@ function GeneralSection() {
 /* ------------------------------------------------------------------ */
 
 function NotificationsSection() {
+  const { t } = useTranslation('settings');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   const { data, isLoading } = useQuery<NotificationSettings>({
@@ -297,30 +314,30 @@ function NotificationsSection() {
 
   return (
     <div className="bg-card border rounded-lg p-6">
-      <h2 className="text-lg font-semibold mb-4">Notification Settings</h2>
+      <h2 className="text-lg font-semibold mb-4">{t('notifications.title')}</h2>
 
       {isLoading ? (
-        <p className="text-muted-foreground text-sm">Loading...</p>
+        <p className="text-muted-foreground text-sm">{tc('loading')}</p>
       ) : (
         <div className="space-y-2 max-w-lg">
           <Toggle
-            label="Email Notifications"
+            label={t('notifications.email')}
             checked={form.emailEnabled}
             onChange={(v) => setForm({ ...form, emailEnabled: v })}
           />
           <Toggle
-            label="SMS Notifications"
+            label={t('notifications.sms')}
             checked={form.smsEnabled}
             onChange={(v) => setForm({ ...form, smsEnabled: v })}
           />
           <Toggle
-            label="Push Notifications"
+            label={t('notifications.push')}
             checked={form.pushEnabled}
             onChange={(v) => setForm({ ...form, pushEnabled: v })}
           />
 
           <div className="pt-4">
-            <label className="block text-sm font-medium mb-1">Default Escalation Policy</label>
+            <label className="block text-sm font-medium mb-1">{t('notifications.escalationPolicy')}</label>
             <select
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
               value={form.defaultEscalationPolicy}
@@ -340,7 +357,7 @@ function NotificationsSection() {
               disabled={mutation.isPending}
               className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50"
             >
-              {mutation.isPending ? 'Saving...' : 'Save Changes'}
+              {mutation.isPending ? tc('saving') : tc('save')}
             </button>
           </div>
 
@@ -348,7 +365,7 @@ function NotificationsSection() {
             <p className="text-sm text-red-500">{(mutation.error as Error).message}</p>
           )}
           {mutation.isSuccess && (
-            <p className="text-sm text-green-600">Notification settings saved.</p>
+            <p className="text-sm text-green-600">{t('notifications.saved')}</p>
           )}
         </div>
       )}
@@ -361,6 +378,8 @@ function NotificationsSection() {
 /* ------------------------------------------------------------------ */
 
 function ApiKeysSection() {
+  const { t } = useTranslation('settings');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
   const [newKeyName, setNewKeyName] = useState('');
   const [generatedKey, setGeneratedKey] = useState<string | null>(null);
@@ -399,7 +418,7 @@ function ApiKeysSection() {
 
   return (
     <div className="bg-card border rounded-lg p-6">
-      <h2 className="text-lg font-semibold mb-4">API Keys</h2>
+      <h2 className="text-lg font-semibold mb-4">{t('apikeys.title')}</h2>
 
       {/* Generate new key */}
       <div className="flex gap-2 mb-4 max-w-lg">
@@ -407,14 +426,14 @@ function ApiKeysSection() {
           className="flex-1 border rounded-md px-3 py-2 bg-background text-sm"
           value={newKeyName}
           onChange={(e) => setNewKeyName(e.target.value)}
-          placeholder="Key name (e.g. CI/CD Pipeline)"
+          placeholder={t('apikeys.namePlaceholder')}
         />
         <button
           disabled={!newKeyName.trim() || createMutation.isPending}
           onClick={() => createMutation.mutate(newKeyName.trim())}
           className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50 whitespace-nowrap"
         >
-          Generate New Key
+          {t('apikeys.generate')}
         </button>
       </div>
 
@@ -422,7 +441,7 @@ function ApiKeysSection() {
       {generatedKey && (
         <div className="mb-4 p-3 bg-green-50 dark:bg-green-900/30 border border-green-200 dark:border-green-800 rounded-md">
           <p className="text-sm font-medium text-green-800 dark:text-green-300 mb-1">
-            New API key generated. Copy it now -- it will not be shown again.
+            {t('apikeys.generatedWarning')}
           </p>
           <code className="block text-sm bg-white dark:bg-gray-900 p-2 rounded border font-mono break-all">
             {generatedKey}
@@ -433,30 +452,30 @@ function ApiKeysSection() {
             }}
             className="mt-2 px-3 py-1 text-xs border rounded hover:bg-muted"
           >
-            Copy to Clipboard
+            {t('apikeys.copyToClipboard')}
           </button>
           <button
             onClick={() => setGeneratedKey(null)}
             className="mt-2 ml-2 px-3 py-1 text-xs border rounded hover:bg-muted"
           >
-            Dismiss
+            {t('apikeys.dismiss')}
           </button>
         </div>
       )}
 
       {/* Keys table */}
       {isLoading ? (
-        <p className="text-muted-foreground text-sm">Loading...</p>
+        <p className="text-muted-foreground text-sm">{tc('loading')}</p>
       ) : (
         <div className="border rounded-lg overflow-hidden">
           <table className="w-full text-sm">
             <thead className="bg-muted/50">
               <tr className="text-left">
-                <th className="px-4 py-3 font-medium">Name</th>
-                <th className="px-4 py-3 font-medium">Key</th>
-                <th className="px-4 py-3 font-medium">Created</th>
-                <th className="px-4 py-3 font-medium">Last Used</th>
-                <th className="px-4 py-3 font-medium text-right">Actions</th>
+                <th className="px-4 py-3 font-medium">{t('apikeys.headerName')}</th>
+                <th className="px-4 py-3 font-medium">{t('apikeys.headerKey')}</th>
+                <th className="px-4 py-3 font-medium">{t('apikeys.headerCreated')}</th>
+                <th className="px-4 py-3 font-medium">{t('apikeys.headerLastUsed')}</th>
+                <th className="px-4 py-3 font-medium text-right">{t('apikeys.headerActions')}</th>
               </tr>
             </thead>
             <tbody className="divide-y">
@@ -468,7 +487,7 @@ function ApiKeysSection() {
                     {format(new Date(k.createdAt), 'MMM d, yyyy')}
                   </td>
                   <td className="px-4 py-3 text-muted-foreground">
-                    {k.lastUsedAt ? format(new Date(k.lastUsedAt), 'MMM d, yyyy') : 'Never'}
+                    {k.lastUsedAt ? format(new Date(k.lastUsedAt), 'MMM d, yyyy') : tc('never')}
                   </td>
                   <td className="px-4 py-3 text-right">
                     <button
@@ -476,7 +495,7 @@ function ApiKeysSection() {
                       disabled={revokeMutation.isPending}
                       className="px-2 py-1 text-xs bg-red-100 text-red-700 rounded hover:bg-red-200 dark:bg-red-900 dark:text-red-300 disabled:opacity-50"
                     >
-                      Revoke
+                      {t('apikeys.revoke')}
                     </button>
                   </td>
                 </tr>
@@ -484,7 +503,7 @@ function ApiKeysSection() {
               {apiKeys.length === 0 && (
                 <tr>
                   <td colSpan={5} className="px-4 py-8 text-center text-muted-foreground">
-                    No API keys. Generate one above.
+                    {t('apikeys.noKeys')}
                   </td>
                 </tr>
               )}
@@ -505,6 +524,8 @@ function ApiKeysSection() {
 /* ------------------------------------------------------------------ */
 
 function ThemeSection() {
+  const { t } = useTranslation('settings');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   const { data, isLoading } = useQuery<ThemeSettings>({
@@ -530,15 +551,15 @@ function ThemeSection() {
 
   return (
     <div className="bg-card border rounded-lg p-6">
-      <h2 className="text-lg font-semibold mb-4">Theme</h2>
+      <h2 className="text-lg font-semibold mb-4">{t('theme.title')}</h2>
 
       {isLoading ? (
-        <p className="text-muted-foreground text-sm">Loading...</p>
+        <p className="text-muted-foreground text-sm">{tc('loading')}</p>
       ) : (
         <div className="space-y-6 max-w-lg">
           {/* Mode toggle */}
           <div>
-            <label className="block text-sm font-medium mb-2">Appearance</label>
+            <label className="block text-sm font-medium mb-2">{t('theme.appearance')}</label>
             <div className="flex gap-2">
               {(['light', 'dark'] as const).map((m) => (
                 <button
@@ -550,7 +571,7 @@ function ThemeSection() {
                       : 'hover:bg-muted'
                   }`}
                 >
-                  {m === 'light' ? 'Light' : 'Dark'}
+                  {t(`theme.${m}`)}
                 </button>
               ))}
             </div>
@@ -558,7 +579,7 @@ function ThemeSection() {
 
           {/* Color presets */}
           <div>
-            <label className="block text-sm font-medium mb-2">Primary Color</label>
+            <label className="block text-sm font-medium mb-2">{t('theme.primaryColor')}</label>
             <div className="flex gap-2 flex-wrap">
               {COLOR_PRESETS.map((c) => (
                 <button
@@ -576,11 +597,11 @@ function ThemeSection() {
                 value={primaryColor}
                 onChange={(e) => setPrimaryColor(e.target.value)}
                 className="w-8 h-8 rounded-full cursor-pointer border-0 p-0"
-                title="Custom color"
+                title={t('theme.customColor')}
               />
             </div>
             <p className="text-xs text-muted-foreground mt-1">
-              Selected: {primaryColor}
+              {t('theme.selected', { color: primaryColor })}
             </p>
           </div>
 
@@ -589,14 +610,14 @@ function ThemeSection() {
             disabled={mutation.isPending}
             className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50"
           >
-            {mutation.isPending ? 'Saving...' : 'Save Theme'}
+            {mutation.isPending ? tc('saving') : t('theme.saveTheme')}
           </button>
 
           {mutation.isError && (
             <p className="text-sm text-red-500">{(mutation.error as Error).message}</p>
           )}
           {mutation.isSuccess && (
-            <p className="text-sm text-green-600">Theme settings saved.</p>
+            <p className="text-sm text-green-600">{t('theme.saved')}</p>
           )}
         </div>
       )}
@@ -609,6 +630,8 @@ function ThemeSection() {
 /* ------------------------------------------------------------------ */
 
 function AccountSection() {
+  const { t } = useTranslation('settings');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   const { data, isLoading } = useQuery<AccountInfo>({
@@ -651,14 +674,14 @@ function AccountSection() {
     <div className="space-y-6">
       {/* Profile card */}
       <div className="bg-card border rounded-lg p-6">
-        <h2 className="text-lg font-semibold mb-4">Account Profile</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('account.profileTitle')}</h2>
 
         {isLoading ? (
-          <p className="text-muted-foreground text-sm">Loading...</p>
+          <p className="text-muted-foreground text-sm">{tc('loading')}</p>
         ) : (
           <div className="space-y-4 max-w-lg">
             <div>
-              <label className="block text-sm font-medium mb-1">Display Name</label>
+              <label className="block text-sm font-medium mb-1">{t('account.displayName')}</label>
               <input
                 className="w-full border rounded-md px-3 py-2 bg-background text-sm"
                 value={displayName}
@@ -667,14 +690,14 @@ function AccountSection() {
             </div>
 
             <div>
-              <label className="block text-sm font-medium mb-1">Email</label>
+              <label className="block text-sm font-medium mb-1">{t('account.email')}</label>
               <input
                 className="w-full border rounded-md px-3 py-2 bg-muted text-sm cursor-not-allowed"
                 value={email}
                 readOnly
               />
               <p className="text-xs text-muted-foreground mt-1">
-                Email cannot be changed here.
+                {t('account.emailHint')}
               </p>
             </div>
 
@@ -683,14 +706,14 @@ function AccountSection() {
               disabled={profileMutation.isPending || !displayName.trim()}
               className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50"
             >
-              {profileMutation.isPending ? 'Saving...' : 'Save Profile'}
+              {profileMutation.isPending ? tc('saving') : t('account.saveProfile')}
             </button>
 
             {profileMutation.isError && (
               <p className="text-sm text-red-500">{(profileMutation.error as Error).message}</p>
             )}
             {profileMutation.isSuccess && (
-              <p className="text-sm text-green-600">Profile updated.</p>
+              <p className="text-sm text-green-600">{t('account.profileSaved')}</p>
             )}
           </div>
         )}
@@ -698,11 +721,11 @@ function AccountSection() {
 
       {/* Password card */}
       <div className="bg-card border rounded-lg p-6">
-        <h2 className="text-lg font-semibold mb-4">Change Password</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('account.changePassword')}</h2>
 
         <div className="space-y-4 max-w-lg">
           <div>
-            <label className="block text-sm font-medium mb-1">Current Password</label>
+            <label className="block text-sm font-medium mb-1">{t('account.currentPassword')}</label>
             <input
               type="password"
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
@@ -712,7 +735,7 @@ function AccountSection() {
           </div>
 
           <div>
-            <label className="block text-sm font-medium mb-1">New Password</label>
+            <label className="block text-sm font-medium mb-1">{t('account.newPassword')}</label>
             <input
               type="password"
               className="w-full border rounded-md px-3 py-2 bg-background text-sm"
@@ -722,7 +745,7 @@ function AccountSection() {
           </div>
 
           <div>
-            <label className="block text-sm font-medium mb-1">Confirm New Password</label>
+            <label className="block text-sm font-medium mb-1">{t('account.confirmPassword')}</label>
             <input
               type="password"
               className={`w-full border rounded-md px-3 py-2 bg-background text-sm ${
@@ -732,7 +755,7 @@ function AccountSection() {
               onChange={(e) => setConfirmPassword(e.target.value)}
             />
             {passwordMismatch && (
-              <p className="text-xs text-red-500 mt-1">Passwords do not match.</p>
+              <p className="text-xs text-red-500 mt-1">{tc('passwordsNoMatch')}</p>
             )}
           </div>
 
@@ -748,14 +771,14 @@ function AccountSection() {
             }
             className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90 disabled:opacity-50"
           >
-            {passwordMutation.isPending ? 'Changing...' : 'Change Password'}
+            {passwordMutation.isPending ? t('account.changing') : t('account.changePassword')}
           </button>
 
           {passwordMutation.isError && (
             <p className="text-sm text-red-500">{(passwordMutation.error as Error).message}</p>
           )}
           {passwordMutation.isSuccess && (
-            <p className="text-sm text-green-600">Password changed successfully.</p>
+            <p className="text-sm text-green-600">{t('account.passwordChanged')}</p>
           )}
         </div>
       </div>
diff --git a/it0-web-admin/src/app/(admin)/standing-orders/[id]/page.tsx b/it0-web-admin/src/app/(admin)/standing-orders/[id]/page.tsx
index fc3f998..f97b283 100644
--- a/it0-web-admin/src/app/(admin)/standing-orders/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/standing-orders/[id]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -233,16 +234,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('standing-orders');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Standing Order</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteDialog.title')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{name}</strong>? This will stop all future
-          executions and cannot be undone.
+          {t('deleteDialog.message')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -250,14 +253,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -291,6 +294,9 @@ function EditDialog({
   onClose: () => void;
   onSubmit: (data: EditFormData) => void;
 }) {
+  const { t } = useTranslation('standing-orders');
+  const { t: tc } = useTranslation('common');
+
   const [form, setForm] = useState<EditFormData>({
     name: '',
     description: '',
@@ -325,12 +331,12 @@ function EditDialog({
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-lg bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-4">Edit Standing Order</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('detail.editStandingOrder')}</h2>
 
         <div className="space-y-4 max-h-[70vh] overflow-y-auto pr-1">
           {/* Name */}
           <div>
-            <label className="block text-sm font-medium mb-1">Name</label>
+            <label className="block text-sm font-medium mb-1">{t('form.name')}</label>
             <input
               type="text"
               value={form.name}
@@ -341,7 +347,7 @@ function EditDialog({
 
           {/* Description */}
           <div>
-            <label className="block text-sm font-medium mb-1">Description</label>
+            <label className="block text-sm font-medium mb-1">{tc('description')}</label>
             <textarea
               value={form.description}
               onChange={(e) => setForm((prev) => ({ ...prev, description: e.target.value }))}
@@ -352,7 +358,7 @@ function EditDialog({
 
           {/* Agent Instruction */}
           <div>
-            <label className="block text-sm font-medium mb-1">Agent Instruction</label>
+            <label className="block text-sm font-medium mb-1">{t('form.agentInstruction')}</label>
             <textarea
               value={form.agentInstruction}
               onChange={(e) => setForm((prev) => ({ ...prev, agentInstruction: e.target.value }))}
@@ -363,19 +369,19 @@ function EditDialog({
 
           {/* Target Servers */}
           <div>
-            <label className="block text-sm font-medium mb-1">Target Servers</label>
+            <label className="block text-sm font-medium mb-1">{t('form.targetServers')}</label>
             <input
               type="text"
               value={form.targetServers}
               onChange={(e) => setForm((prev) => ({ ...prev, targetServers: e.target.value }))}
               className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-              placeholder="server-1, server-2 (comma-separated)"
+              placeholder={t('form.targetServersPlaceholder')}
             />
           </div>
 
           {/* Max Budget */}
           <div>
-            <label className="block text-sm font-medium mb-1">Max Budget (USD)</label>
+            <label className="block text-sm font-medium mb-1">{t('form.maxBudget')}</label>
             <input
               type="number"
               min="0"
@@ -397,7 +403,7 @@ function EditDialog({
                 }
                 className="accent-primary h-4 w-4"
               />
-              Escalate on failure
+              {t('form.escalateOnFailure')}
             </label>
           </div>
         </div>
@@ -409,7 +415,7 @@ function EditDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -417,7 +423,7 @@ function EditDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save Changes'}
+            {saving ? tc('saving') : tc('save')}
           </button>
         </div>
       </div>
@@ -430,6 +436,8 @@ function EditDialog({
 // ---------------------------------------------------------------------------
 
 export default function StandingOrderDetailPage() {
+  const { t } = useTranslation('standing-orders');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const id = params.id as string;
@@ -589,7 +597,7 @@ export default function StandingOrderDetailPage() {
   if (isLoading) {
     return (
       <div className="text-sm text-muted-foreground py-12 text-center">
-        Loading standing order...
+        {t('detail.loading')}
       </div>
     );
   }
@@ -602,10 +610,10 @@ export default function StandingOrderDetailPage() {
           onClick={() => router.push('/standing-orders')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Standing Orders
+          &larr; {t('detail.backToStandingOrders')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load standing order: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -618,10 +626,10 @@ export default function StandingOrderDetailPage() {
           onClick={() => router.push('/standing-orders')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1"
         >
-          &larr; Back to Standing Orders
+          &larr; {t('detail.backToStandingOrders')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Standing order not found.
+          {t('detail.notFound')}
         </div>
       </div>
     );
@@ -636,7 +644,7 @@ export default function StandingOrderDetailPage() {
           onClick={() => router.push('/standing-orders')}
           className="text-sm text-muted-foreground hover:text-foreground mb-4 inline-flex items-center gap-1 transition-colors"
         >
-          &larr; Back to Standing Orders
+          &larr; {t('detail.backToStandingOrders')}
         </button>
 
         <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
@@ -657,10 +665,10 @@ export default function StandingOrderDetailPage() {
             )}
           >
             {toggleStatusMutation.isPending
-              ? 'Updating...'
+              ? tc('loading')
               : order.status === 'active'
-                ? 'Pause Order'
-                : 'Activate Order'}
+                ? t('detail.pauseOrder')
+                : t('detail.activateOrder')}
           </button>
         </div>
 
@@ -676,19 +684,19 @@ export default function StandingOrderDetailPage() {
           {/* Overview card */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Overview</h2>
+              <h2 className="text-base font-semibold">{t('detail.overview')}</h2>
             </div>
             <div className="px-6 py-4 space-y-5">
               {/* Trigger configuration */}
               <div>
                 <h3 className="text-sm font-medium text-muted-foreground mb-2">
-                  Trigger Configuration
+                  {t('detail.triggerConfiguration')}
                 </h3>
                 <div className="bg-muted/50 rounded-md p-3 space-y-1">
                   {order.triggerType === 'cron' && (
                     <>
                       <div className="flex items-center gap-2 text-sm">
-                        <span className="text-muted-foreground">Expression:</span>
+                        <span className="text-muted-foreground">{t('detail.expression')}</span>
                         <code className="font-mono text-xs bg-background px-2 py-0.5 rounded border">
                           {order.triggerConfig.cronExpression ?? '--'}
                         </code>
@@ -702,7 +710,7 @@ export default function StandingOrderDetailPage() {
                   )}
                   {order.triggerType === 'event' && (
                     <div className="flex items-center gap-2 text-sm">
-                      <span className="text-muted-foreground">Event Type:</span>
+                      <span className="text-muted-foreground">{t('detail.eventType')}</span>
                       <code className="font-mono text-xs bg-background px-2 py-0.5 rounded border">
                         {order.triggerConfig.eventType ?? '--'}
                       </code>
@@ -711,11 +719,11 @@ export default function StandingOrderDetailPage() {
                   {order.triggerType === 'threshold' && (
                     <>
                       <div className="flex items-center gap-2 text-sm">
-                        <span className="text-muted-foreground">Metric:</span>
+                        <span className="text-muted-foreground">{t('form.metric')}:</span>
                         <span className="font-medium">{order.triggerConfig.metric ?? '--'}</span>
                       </div>
                       <div className="flex items-center gap-2 text-sm">
-                        <span className="text-muted-foreground">Condition:</span>
+                        <span className="text-muted-foreground">{t('form.condition')}:</span>
                         <span className="font-medium">
                           {order.triggerConfig.condition ?? '>='}{' '}
                           {order.triggerConfig.thresholdValue ?? '--'}
@@ -729,7 +737,7 @@ export default function StandingOrderDetailPage() {
               {/* Agent instruction */}
               <div>
                 <h3 className="text-sm font-medium text-muted-foreground mb-2">
-                  Agent Instruction
+                  {t('detail.agentInstruction')}
                 </h3>
                 <div className="bg-gray-950 text-gray-200 font-mono text-sm p-4 rounded-md whitespace-pre-wrap">
                   {order.agentInstruction}
@@ -738,9 +746,9 @@ export default function StandingOrderDetailPage() {
 
               {/* Target servers */}
               <div>
-                <h3 className="text-sm font-medium text-muted-foreground mb-2">Target Servers</h3>
+                <h3 className="text-sm font-medium text-muted-foreground mb-2">{t('detail.targetServers')}</h3>
                 {order.targetServers.length === 0 ? (
-                  <p className="text-sm text-muted-foreground">No target servers configured.</p>
+                  <p className="text-sm text-muted-foreground">{t('detail.noTargetServers')}</p>
                 ) : (
                   <div className="flex flex-wrap gap-2">
                     {order.targetServers.map((server) => (
@@ -757,7 +765,7 @@ export default function StandingOrderDetailPage() {
 
               {/* Max budget */}
               <div>
-                <h3 className="text-sm font-medium text-muted-foreground mb-1">Max Budget</h3>
+                <h3 className="text-sm font-medium text-muted-foreground mb-1">{t('detail.maxBudget')}</h3>
                 <p className="text-sm font-medium">${order.maxBudgetUsd.toFixed(2)} USD</p>
               </div>
             </div>
@@ -766,18 +774,18 @@ export default function StandingOrderDetailPage() {
           {/* Execution History */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Execution History</h2>
+              <h2 className="text-base font-semibold">{t('executionHistory.title')}</h2>
             </div>
 
             {executionsLoading && (
               <div className="text-sm text-muted-foreground py-12 text-center">
-                Loading executions...
+                {t('executionHistory.loading')}
               </div>
             )}
 
             {executionsError && (
               <div className="p-4 mx-6 my-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-                Failed to load executions: {(executionsError as Error).message}
+                {t('executionHistory.loadError')} {(executionsError as Error).message}
               </div>
             )}
 
@@ -788,17 +796,17 @@ export default function StandingOrderDetailPage() {
                     <thead>
                       <tr className="border-b bg-muted/50">
                         <th className="w-8 px-4 py-3" />
-                        <th className="text-left px-4 py-3 font-medium">Date</th>
-                        <th className="text-left px-4 py-3 font-medium">Status</th>
-                        <th className="text-left px-4 py-3 font-medium">Duration</th>
-                        <th className="text-right px-4 py-3 font-medium">Commands</th>
+                        <th className="text-left px-4 py-3 font-medium">{t('executionHistory.table.date')}</th>
+                        <th className="text-left px-4 py-3 font-medium">{t('executionHistory.table.status')}</th>
+                        <th className="text-left px-4 py-3 font-medium">{t('executionHistory.table.duration')}</th>
+                        <th className="text-right px-4 py-3 font-medium">{t('executionHistory.table.commands')}</th>
                       </tr>
                     </thead>
                     <tbody>
                       {executions.length === 0 ? (
                         <tr>
                           <td colSpan={5} className="text-center text-muted-foreground py-12">
-                            No executions recorded yet.
+                            {t('executionHistory.empty')}
                           </td>
                         </tr>
                       ) : (
@@ -839,7 +847,7 @@ export default function StandingOrderDetailPage() {
                                 {exec.durationMs != null
                                   ? formatDuration(exec.durationMs)
                                   : exec.status === 'running'
-                                    ? 'In progress...'
+                                    ? t('executionHistory.inProgress')
                                     : '--'}
                               </td>
                               <td className="px-4 py-3 text-right tabular-nums">
@@ -853,7 +861,7 @@ export default function StandingOrderDetailPage() {
                                 <td colSpan={5} className="bg-muted/10 border-b px-6 py-4">
                                   <div>
                                     <h4 className="text-xs font-semibold uppercase text-muted-foreground mb-2">
-                                      Execution Summary
+                                      {t('executionHistory.executionSummary')}
                                     </h4>
                                     {exec.summary ? (
                                       <p className="text-sm text-foreground whitespace-pre-wrap">
@@ -861,13 +869,13 @@ export default function StandingOrderDetailPage() {
                                       </p>
                                     ) : (
                                       <p className="text-sm text-muted-foreground italic">
-                                        No summary available.
+                                        {t('executionHistory.noSummary')}
                                       </p>
                                     )}
                                     <div className="mt-3 flex gap-4 text-xs text-muted-foreground">
-                                      <span>Started: {formatDate(exec.startedAt)}</span>
+                                      <span>{t('executionHistory.started')} {formatDate(exec.startedAt)}</span>
                                       {exec.endedAt && (
-                                        <span>Ended: {formatDate(exec.endedAt)}</span>
+                                        <span>{t('executionHistory.ended')} {formatDate(exec.endedAt)}</span>
                                       )}
                                     </div>
                                   </div>
@@ -885,10 +893,7 @@ export default function StandingOrderDetailPage() {
                 {totalPages > 1 && (
                   <div className="flex items-center justify-between px-6 py-3 border-t">
                     <div className="text-xs text-muted-foreground">
-                      Showing {executionPage * PAGE_SIZE + 1}
-                      {' - '}
-                      {Math.min((executionPage + 1) * PAGE_SIZE, totalExecutions)} of{' '}
-                      {totalExecutions}
+                      {t('detail.pagination.showing', { from: executionPage * PAGE_SIZE + 1, to: Math.min((executionPage + 1) * PAGE_SIZE, totalExecutions), total: totalExecutions })}
                     </div>
                     <div className="flex items-center gap-2">
                       <button
@@ -896,17 +901,17 @@ export default function StandingOrderDetailPage() {
                         disabled={executionPage === 0}
                         className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                       >
-                        Previous
+                        {t('detail.pagination.previous')}
                       </button>
                       <span className="text-xs text-muted-foreground">
-                        Page {executionPage + 1} of {totalPages}
+                        {t('detail.pagination.pageOf', { current: executionPage + 1, total: totalPages })}
                       </span>
                       <button
                         onClick={() => setExecutionPage((p) => Math.min(totalPages - 1, p + 1))}
                         disabled={executionPage >= totalPages - 1}
                         className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                       >
-                        Next
+                        {t('detail.pagination.next')}
                       </button>
                     </div>
                   </div>
@@ -921,12 +926,12 @@ export default function StandingOrderDetailPage() {
           {/* Status & Controls card */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Status & Controls</h2>
+              <h2 className="text-base font-semibold">{t('detail.statusAndControls')}</h2>
             </div>
             <div className="px-6 py-4 space-y-4">
               {/* Status toggle */}
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Status</span>
+                <span className="text-sm text-muted-foreground">{tc('status')}</span>
                 <div className="flex items-center gap-2">
                   <StatusBadge status={order.status} />
                   <button
@@ -956,7 +961,7 @@ export default function StandingOrderDetailPage() {
 
               {/* Escalate on Failure toggle */}
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Escalate on Failure</span>
+                <span className="text-sm text-muted-foreground">{t('detail.escalateOnFailure')}</span>
                 <button
                   onClick={handleToggleEscalate}
                   disabled={toggleEscalateMutation.isPending}
@@ -983,16 +988,16 @@ export default function StandingOrderDetailPage() {
 
               {/* Last execution */}
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Last Execution</span>
+                <span className="text-sm text-muted-foreground">{t('detail.lastExecution')}</span>
                 <span className="text-sm">
-                  {order.lastExecutionAt ? formatRelativeTime(order.lastExecutionAt) : 'Never'}
+                  {order.lastExecutionAt ? formatRelativeTime(order.lastExecutionAt) : tc('never')}
                 </span>
               </div>
 
               {/* Next scheduled run */}
               {order.triggerType === 'cron' && (
                 <div className="flex items-center justify-between">
-                  <span className="text-sm text-muted-foreground">Next Run</span>
+                  <span className="text-sm text-muted-foreground">{t('detail.nextRun')}</span>
                   <span className="text-sm">
                     {order.nextRunAt ? formatRelativeTime(order.nextRunAt) : '--'}
                   </span>
@@ -1004,7 +1009,7 @@ export default function StandingOrderDetailPage() {
           {/* Quick Actions card */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Quick Actions</h2>
+              <h2 className="text-base font-semibold">{t('detail.quickActions')}</h2>
             </div>
             <div className="px-6 py-4 space-y-2">
               <button
@@ -1012,12 +1017,12 @@ export default function StandingOrderDetailPage() {
                 disabled={executeNowMutation.isPending}
                 className="w-full px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors"
               >
-                {executeNowMutation.isPending ? 'Triggering...' : 'Execute Now'}
+                {executeNowMutation.isPending ? t('detail.triggering') : t('detail.executeNow')}
               </button>
 
               {executeNowMutation.isSuccess && (
                 <p className="text-xs text-green-600 dark:text-green-400">
-                  Execution triggered successfully.
+                  {t('detail.executionTriggered')}
                 </p>
               )}
 
@@ -1031,21 +1036,21 @@ export default function StandingOrderDetailPage() {
                 onClick={() => setEditOpen(true)}
                 className="w-full px-4 py-2 text-sm rounded-md border border-input hover:bg-accent transition-colors"
               >
-                Edit
+                {t('detail.edit')}
               </button>
 
               <button
                 onClick={() => router.push(`/audit/logs?standingOrderId=${id}`)}
                 className="w-full px-4 py-2 text-sm rounded-md border border-input hover:bg-accent transition-colors"
               >
-                View Logs
+                {t('detail.viewLogs')}
               </button>
 
               <button
                 onClick={() => setDeleteOpen(true)}
                 className="w-full px-4 py-2 text-sm rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
               >
-                Delete
+                {t('detail.delete')}
               </button>
             </div>
           </div>
@@ -1053,16 +1058,16 @@ export default function StandingOrderDetailPage() {
           {/* Statistics card */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Statistics</h2>
+              <h2 className="text-base font-semibold">{t('detail.statistics')}</h2>
             </div>
             <div className="px-6 py-4 space-y-4">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Total Executions</span>
+                <span className="text-sm text-muted-foreground">{t('detail.stats.totalExecutions')}</span>
                 <span className="text-sm font-medium tabular-nums">{stats.totalExecutions}</span>
               </div>
 
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Success Rate</span>
+                <span className="text-sm text-muted-foreground">{t('detail.stats.successRate')}</span>
                 <span
                   className={cn(
                     'text-sm font-medium tabular-nums',
@@ -1078,16 +1083,16 @@ export default function StandingOrderDetailPage() {
               </div>
 
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Avg Duration</span>
+                <span className="text-sm text-muted-foreground">{t('detail.stats.avgDuration')}</span>
                 <span className="text-sm font-medium tabular-nums">
                   {stats.avgDurationMs > 0 ? formatDuration(stats.avgDurationMs) : '--'}
                 </span>
               </div>
 
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Last Failure</span>
+                <span className="text-sm text-muted-foreground">{t('detail.stats.lastFailure')}</span>
                 <span className="text-sm">
-                  {stats.lastFailureAt ? formatRelativeTime(stats.lastFailureAt) : 'None'}
+                  {stats.lastFailureAt ? formatRelativeTime(stats.lastFailureAt) : tc('none')}
                 </span>
               </div>
             </div>
@@ -1096,23 +1101,23 @@ export default function StandingOrderDetailPage() {
           {/* Metadata */}
           <div className="border rounded-lg">
             <div className="px-6 py-4 border-b">
-              <h2 className="text-base font-semibold">Metadata</h2>
+              <h2 className="text-base font-semibold">{t('detail.metadata')}</h2>
             </div>
             <div className="px-6 py-4 space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Created</span>
+                <span className="text-sm text-muted-foreground">{tc('created')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(order.createdAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Updated</span>
+                <span className="text-sm text-muted-foreground">{tc('updated')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(order.updatedAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">ID</span>
+                <span className="text-sm text-muted-foreground">{tc('id')}</span>
                 <code className="text-xs font-mono text-muted-foreground bg-muted px-1.5 py-0.5 rounded">
                   {order.id}
                 </code>
diff --git a/it0-web-admin/src/app/(admin)/standing-orders/page.tsx b/it0-web-admin/src/app/(admin)/standing-orders/page.tsx
index d917813..e1a5cda 100644
--- a/it0-web-admin/src/app/(admin)/standing-orders/page.tsx
+++ b/it0-web-admin/src/app/(admin)/standing-orders/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -68,12 +69,6 @@ const emptyForm: StandingOrderFormData = {
   escalateOnFailure: false,
 };
 
-const TRIGGER_TYPE_OPTIONS: { value: TriggerType; label: string }[] = [
-  { value: 'cron', label: 'Cron Schedule' },
-  { value: 'event', label: 'Event' },
-  { value: 'threshold', label: 'Threshold' },
-];
-
 const EVENT_TYPE_OPTIONS = [
   'server.cpu_high',
   'server.disk_full',
@@ -93,6 +88,8 @@ const STATUS_COLORS: Record<string, string> = {
 
 /* ---------- Execution History Sub-component ---------- */
 function ExecutionHistory({ orderId }: { orderId: string }) {
+  const { t } = useTranslation('standing-orders');
+
   const { data: executions = [], isLoading, error } = useQuery<Execution[]>({
     queryKey: queryKeys.standingOrders.executions(orderId),
     queryFn: () =>
@@ -101,35 +98,35 @@ function ExecutionHistory({ orderId }: { orderId: string }) {
 
   if (isLoading) {
     return (
-      <div className="px-4 py-3 text-sm text-muted-foreground">Loading executions...</div>
+      <div className="px-4 py-3 text-sm text-muted-foreground">{t('executionHistory.loading')}</div>
     );
   }
   if (error) {
     return (
       <div className="px-4 py-3 text-sm text-destructive-foreground">
-        Failed to load executions: {(error as Error).message}
+        {t('executionHistory.loadError')} {(error as Error).message}
       </div>
     );
   }
   if (executions.length === 0) {
     return (
-      <div className="px-4 py-3 text-sm text-muted-foreground">No executions recorded yet.</div>
+      <div className="px-4 py-3 text-sm text-muted-foreground">{t('executionHistory.empty')}</div>
     );
   }
 
   return (
     <div className="px-4 py-3">
       <h4 className="text-xs font-semibold uppercase text-muted-foreground mb-2">
-        Execution History
+        {t('executionHistory.title')}
       </h4>
       <table className="w-full text-xs">
         <thead>
           <tr className="border-b">
-            <th className="text-left py-1.5 pr-4 font-medium">Status</th>
-            <th className="text-left py-1.5 pr-4 font-medium">Started</th>
-            <th className="text-left py-1.5 pr-4 font-medium">Completed</th>
-            <th className="text-left py-1.5 pr-4 font-medium">Summary</th>
-            <th className="text-right py-1.5 font-medium">Cost</th>
+            <th className="text-left py-1.5 pr-4 font-medium">{t('executionHistory.table.status')}</th>
+            <th className="text-left py-1.5 pr-4 font-medium">{t('executionHistory.started')}</th>
+            <th className="text-left py-1.5 pr-4 font-medium">{t('executionHistory.ended')}</th>
+            <th className="text-left py-1.5 pr-4 font-medium">{t('executionHistory.table.summary')}</th>
+            <th className="text-right py-1.5 font-medium">{t('executionHistory.table.cost')}</th>
           </tr>
         </thead>
         <tbody>
@@ -165,8 +162,16 @@ function ExecutionHistory({ orderId }: { orderId: string }) {
 
 /* ---------- Main Component ---------- */
 export default function StandingOrdersPage() {
+  const { t } = useTranslation('standing-orders');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
+  const TRIGGER_TYPE_OPTIONS: { value: TriggerType; label: string }[] = [
+    { value: 'cron', label: t('triggerTypes.cron') },
+    { value: 'event', label: t('triggerTypes.event') },
+    { value: 'threshold', label: t('triggerTypes.threshold') },
+  ];
+
   /* Dialog state */
   const [dialogOpen, setDialogOpen] = useState(false);
   const [editingId, setEditingId] = useState<string | null>(null);
@@ -311,28 +316,28 @@ export default function StandingOrdersPage() {
       {/* Header */}
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Standing Orders</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage autonomous operation tasks and execution schedules.
+            {t('subtitle')}
           </p>
         </div>
         <button
           onClick={openCreate}
           className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:bg-primary/90 transition-colors"
         >
-          New Standing Order
+          {t('newOrder')}
         </button>
       </div>
 
       {/* Loading / Error */}
       {isLoading && (
         <div className="text-muted-foreground text-sm py-12 text-center">
-          Loading standing orders...
+          {t('loading')}
         </div>
       )}
       {error && (
         <div className="text-destructive text-sm py-4">
-          Failed to load standing orders: {(error as Error).message}
+          {t('loadError')} {(error as Error).message}
         </div>
       )}
 
@@ -343,18 +348,18 @@ export default function StandingOrdersPage() {
             <thead>
               <tr className="border-b bg-muted/50">
                 <th className="w-8 px-4 py-3" />
-                <th className="text-left px-4 py-3 font-medium">Name</th>
-                <th className="text-left px-4 py-3 font-medium">Trigger</th>
-                <th className="text-center px-4 py-3 font-medium">Status</th>
-                <th className="text-left px-4 py-3 font-medium">Last Execution</th>
-                <th className="text-right px-4 py-3 font-medium">Actions</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.name')}</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.trigger')}</th>
+                <th className="text-center px-4 py-3 font-medium">{t('table.status')}</th>
+                <th className="text-left px-4 py-3 font-medium">{t('table.lastExecution')}</th>
+                <th className="text-right px-4 py-3 font-medium">{t('table.actions')}</th>
               </tr>
             </thead>
             {orders.length === 0 ? (
               <tbody>
                 <tr>
                   <td colSpan={6} className="px-4 py-12 text-center text-muted-foreground">
-                    No standing orders yet. Click &quot;New Standing Order&quot; to create one.
+                    {t('empty')}
                   </td>
                 </tr>
               </tbody>
@@ -435,7 +440,7 @@ export default function StandingOrdersPage() {
                           ? formatDistanceToNow(new Date(order.lastExecutionAt), {
                               addSuffix: true,
                             })
-                          : 'Never'}
+                          : tc('never')}
                       </td>
 
                       <td className="px-4 py-3 text-right space-x-2">
@@ -446,7 +451,7 @@ export default function StandingOrdersPage() {
                           }}
                           className="text-xs text-primary hover:underline"
                         >
-                          Edit
+                          {tc('edit')}
                         </button>
                         {deleteConfirmId === order.id ? (
                           <>
@@ -458,7 +463,7 @@ export default function StandingOrdersPage() {
                               className="text-xs text-destructive-foreground bg-destructive px-2 py-0.5 rounded hover:bg-destructive/80"
                               disabled={deleteMutation.isPending}
                             >
-                              Confirm
+                              {tc('confirm')}
                             </button>
                             <button
                               onClick={(e) => {
@@ -467,7 +472,7 @@ export default function StandingOrdersPage() {
                               }}
                               className="text-xs text-muted-foreground hover:underline"
                             >
-                              Cancel
+                              {tc('cancel')}
                             </button>
                           </>
                         ) : (
@@ -478,7 +483,7 @@ export default function StandingOrdersPage() {
                             }}
                             className="text-xs text-destructive-foreground hover:underline"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         )}
                       </td>
@@ -509,7 +514,7 @@ export default function StandingOrdersPage() {
           <div className="relative z-10 w-full max-w-2xl max-h-[90vh] overflow-y-auto bg-card border rounded-lg shadow-xl mx-4">
             <div className="flex items-center justify-between px-6 pt-6 pb-2">
               <h2 className="text-lg font-semibold">
-                {editingId ? 'Edit Standing Order' : 'New Standing Order'}
+                {editingId ? t('detail.editStandingOrder') : t('newOrder')}
               </h2>
               <button
                 onClick={closeDialog}
@@ -522,7 +527,7 @@ export default function StandingOrdersPage() {
             <form onSubmit={handleSubmit} className="px-6 pb-6 space-y-4">
               {/* Name */}
               <div>
-                <label className="block text-sm font-medium mb-1">Name</label>
+                <label className="block text-sm font-medium mb-1">{t('form.name')}</label>
                 <input
                   type="text"
                   required
@@ -535,12 +540,12 @@ export default function StandingOrdersPage() {
 
               {/* Trigger Config Section */}
               <fieldset className="border rounded-md p-4 space-y-3">
-                <legend className="text-sm font-medium px-1">Trigger Configuration</legend>
+                <legend className="text-sm font-medium px-1">{t('form.triggerConfiguration')}</legend>
 
                 {/* Trigger Type */}
                 <div>
                   <label className="block text-xs font-medium mb-1 text-muted-foreground">
-                    Trigger Type
+                    {t('form.triggerType')}
                   </label>
                   <select
                     value={form.triggerType}
@@ -561,7 +566,7 @@ export default function StandingOrdersPage() {
                 {form.triggerType === 'cron' && (
                   <div>
                     <label className="block text-xs font-medium mb-1 text-muted-foreground">
-                      Cron Expression
+                      {t('form.cronExpression')}
                     </label>
                     <input
                       type="text"
@@ -581,7 +586,7 @@ export default function StandingOrdersPage() {
                 {form.triggerType === 'event' && (
                   <div>
                     <label className="block text-xs font-medium mb-1 text-muted-foreground">
-                      Event Type
+                      {t('form.eventType')}
                     </label>
                     <select
                       value={form.eventType}
@@ -603,7 +608,7 @@ export default function StandingOrdersPage() {
                   <div className="grid grid-cols-2 gap-3">
                     <div>
                       <label className="block text-xs font-medium mb-1 text-muted-foreground">
-                        Metric
+                        {t('form.metric')}
                       </label>
                       <input
                         type="text"
@@ -616,7 +621,7 @@ export default function StandingOrdersPage() {
                     </div>
                     <div>
                       <label className="block text-xs font-medium mb-1 text-muted-foreground">
-                        Threshold
+                        {t('form.thresholdValue')}
                       </label>
                       <input
                         type="number"
@@ -634,13 +639,13 @@ export default function StandingOrdersPage() {
 
               {/* Target Servers */}
               <div>
-                <label className="block text-sm font-medium mb-1">Target Servers</label>
+                <label className="block text-sm font-medium mb-1">{t('form.targetServers')}</label>
                 <input
                   type="text"
                   value={form.targetServers}
                   onChange={(e) => setForm({ ...form, targetServers: e.target.value })}
                   className="w-full px-3 py-2 rounded-md bg-background border text-sm focus:outline-none focus:ring-2 focus:ring-ring"
-                  placeholder="server-1, server-2, server-3 (comma-separated IDs)"
+                  placeholder={t('form.targetServersPlaceholder')}
                 />
                 <p className="text-xs text-muted-foreground mt-1">
                   Comma-separated server IDs this order applies to.
@@ -649,7 +654,7 @@ export default function StandingOrdersPage() {
 
               {/* Agent Instruction */}
               <div>
-                <label className="block text-sm font-medium mb-1">Agent Instruction</label>
+                <label className="block text-sm font-medium mb-1">{t('form.agentInstruction')}</label>
                 <textarea
                   value={form.agentInstruction}
                   onChange={(e) => setForm({ ...form, agentInstruction: e.target.value })}
@@ -661,7 +666,7 @@ export default function StandingOrdersPage() {
 
               {/* Max Budget */}
               <div>
-                <label className="block text-sm font-medium mb-1">Max Budget ($)</label>
+                <label className="block text-sm font-medium mb-1">{t('form.maxBudget')}</label>
                 <input
                   type="number"
                   min="0"
@@ -684,7 +689,7 @@ export default function StandingOrdersPage() {
                     }
                     className="accent-primary h-4 w-4"
                   />
-                  Escalate on failure
+                  {t('form.escalateOnFailure')}
                 </label>
                 <p className="text-xs text-muted-foreground mt-1 ml-6">
                   Notify administrators when an execution fails.
@@ -705,7 +710,7 @@ export default function StandingOrdersPage() {
                   onClick={closeDialog}
                   className="px-4 py-2 rounded-md border text-sm hover:bg-muted transition-colors"
                 >
-                  Cancel
+                  {tc('cancel')}
                 </button>
                 <button
                   type="submit"
@@ -713,10 +718,10 @@ export default function StandingOrdersPage() {
                   className="px-4 py-2 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors disabled:opacity-50"
                 >
                   {isSaving
-                    ? 'Saving...'
+                    ? tc('saving')
                     : editingId
-                      ? 'Update Standing Order'
-                      : 'Create Standing Order'}
+                      ? t('detail.editStandingOrder')
+                      : t('newOrder')}
                 </button>
               </div>
             </form>
diff --git a/it0-web-admin/src/app/(admin)/tenants/[id]/page.tsx b/it0-web-admin/src/app/(admin)/tenants/[id]/page.tsx
index b416067..66e9d7b 100644
--- a/it0-web-admin/src/app/(admin)/tenants/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/tenants/[id]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -134,16 +135,18 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('tenants');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete Tenant</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('detail.deleteDialog.title')}</h2>
         <p className="text-sm text-muted-foreground mb-6">
-          Are you sure you want to delete <strong>{name}</strong>? This will permanently remove the
-          tenant, all its data, and all member associations. This action cannot be undone.
+          {t('detail.deleteDialog.message')}
         </p>
         <div className="flex justify-end gap-3">
           <button
@@ -151,14 +154,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -212,6 +215,8 @@ function InfoRow({ label, value }: { label: string; value: React.ReactNode }) {
 // ---------------------------------------------------------------------------
 
 export default function TenantDetailPage() {
+  const { t } = useTranslation('tenants');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
@@ -343,10 +348,10 @@ export default function TenantDetailPage() {
 
   const validate = useCallback((): boolean => {
     const next: Partial<Record<keyof TenantFormData, string>> = {};
-    if (!form.name.trim()) next.name = 'Name is required';
+    if (!form.name.trim()) next.name = t('detail.validation.nameRequired');
     setErrors(next);
     return Object.keys(next).length === 0;
-  }, [form]);
+  }, [form, t]);
 
   const handleSave = useCallback(() => {
     if (!validate()) return;
@@ -387,10 +392,10 @@ export default function TenantDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Tenants
+          {t('detail.backToTenants')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading tenant details...
+          {t('detail.loading')}
         </div>
       </div>
     );
@@ -418,10 +423,10 @@ export default function TenantDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Tenants
+          {t('detail.backToTenants')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load tenant: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -450,7 +455,7 @@ export default function TenantDetailPage() {
           <path d="M19 12H5" />
           <path d="m12 19-7-7 7-7" />
         </svg>
-        Back to Tenants
+        {t('detail.backToTenants')}
       </button>
 
       {/* Page header */}
@@ -467,13 +472,13 @@ export default function TenantDetailPage() {
           {/* Tenant Information Card */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Tenant Information</h2>
+              <h2 className="text-lg font-semibold">{t('detail.tenantInformation')}</h2>
               {!isEditing && (
                 <button
                   onClick={startEditing}
                   className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                 >
-                  Edit
+                  {tc('edit')}
                 </button>
               )}
             </div>
@@ -484,7 +489,7 @@ export default function TenantDetailPage() {
                 {/* name */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Name <span className="text-destructive">*</span>
+                    {tc('name')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -503,35 +508,35 @@ export default function TenantDetailPage() {
 
                 {/* plan */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Plan</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.plan')}</label>
                   <select
                     value={form.plan}
                     onChange={(e) => handleChange('plan', e.target.value)}
                     className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
                   >
-                    <option value="free">Free</option>
-                    <option value="pro">Pro</option>
-                    <option value="enterprise">Enterprise</option>
+                    <option value="free">{t('plans.free')}</option>
+                    <option value="pro">{t('plans.pro')}</option>
+                    <option value="enterprise">{t('plans.enterprise')}</option>
                   </select>
                 </div>
 
                 {/* status */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Status</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.status')}</label>
                   <select
                     value={form.status}
                     onChange={(e) => handleChange('status', e.target.value)}
                     className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
                   >
-                    <option value="active">Active</option>
-                    <option value="suspended">Suspended</option>
+                    <option value="active">{t('statuses.active')}</option>
+                    <option value="suspended">{t('statuses.suspended')}</option>
                   </select>
                 </div>
 
                 {/* Update error */}
                 {updateMutation.isError && (
                   <div className="p-3 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-                    Failed to update tenant: {(updateMutation.error as Error).message}
+                    {t('detail.failedToUpdate')} {(updateMutation.error as Error).message}
                   </div>
                 )}
 
@@ -543,7 +548,7 @@ export default function TenantDetailPage() {
                     className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
                     disabled={updateMutation.isPending}
                   >
-                    Cancel
+                    {tc('cancel')}
                   </button>
                   <button
                     type="button"
@@ -551,22 +556,22 @@ export default function TenantDetailPage() {
                     disabled={updateMutation.isPending}
                     className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
                   >
-                    {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                    {updateMutation.isPending ? tc('saving') : tc('save')}
                   </button>
                 </div>
               </div>
             ) : (
               /* ---------- Read-only info display ---------- */
               <dl className="divide-y">
-                <InfoRow label="Name" value={tenant.name} />
+                <InfoRow label={tc('name')} value={tenant.name} />
                 <InfoRow
-                  label="Slug"
+                  label={t('detail.slug')}
                   value={
                     <span className="font-mono text-xs">{tenant.slug}</span>
                   }
                 />
                 <InfoRow
-                  label="Schema Name"
+                  label={t('detail.schemaName')}
                   value={
                     <code className="font-mono text-xs bg-muted px-1.5 py-0.5 rounded">
                       {tenant.schemaName}
@@ -574,37 +579,37 @@ export default function TenantDetailPage() {
                   }
                 />
                 <InfoRow
-                  label="Plan"
+                  label={t('form.plan')}
                   value={<PlanBadge plan={tenant.plan} />}
                 />
                 <InfoRow
-                  label="Status"
+                  label={tc('status')}
                   value={<StatusBadge status={tenant.status} />}
                 />
-                <InfoRow label="Members" value={String(tenant.memberCount)} />
-                <InfoRow label="Created" value={formatDate(tenant.createdAt)} />
-                <InfoRow label="Updated" value={formatDate(tenant.updatedAt)} />
+                <InfoRow label={t('detail.memberCount')} value={String(tenant.memberCount)} />
+                <InfoRow label={tc('created')} value={formatDate(tenant.createdAt)} />
+                <InfoRow label={tc('updated')} value={formatDate(tenant.updatedAt)} />
               </dl>
             )}
           </div>
 
           {/* Member List */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Members</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.members')}</h2>
 
             {members.length === 0 ? (
               <p className="text-sm text-muted-foreground py-4 text-center">
-                No members found.
+                {t('detail.noMembers')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Name</th>
-                      <th className="text-left px-3 py-2 font-medium">Email</th>
-                      <th className="text-left px-3 py-2 font-medium">Role</th>
-                      <th className="text-right px-3 py-2 font-medium">Joined</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.membersTable.name')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.membersTable.email')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.membersTable.role')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('detail.membersTable.joined')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -634,37 +639,37 @@ export default function TenantDetailPage() {
           {/* Invitations */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">Invitations</h2>
+              <h2 className="text-lg font-semibold">{t('detail.invitations')}</h2>
               <button
                 onClick={() => setShowInviteForm(!showInviteForm)}
                 className="px-3 py-1 text-xs rounded-md bg-primary text-primary-foreground hover:opacity-90"
               >
-                + Invite User
+                {t('detail.inviteUser')}
               </button>
             </div>
 
             {showInviteForm && (
               <div className="mb-4 p-4 border rounded-md bg-muted/30 space-y-3">
                 <div>
-                  <label className="block text-sm font-medium mb-1">Email</label>
+                  <label className="block text-sm font-medium mb-1">{t('detail.inviteForm.email')}</label>
                   <input
                     type="email"
                     value={inviteEmail}
                     onChange={(e) => setInviteEmail(e.target.value)}
                     className="w-full px-3 py-2 bg-background border rounded-md text-sm"
-                    placeholder="user@example.com"
+                    placeholder={t('detail.inviteForm.emailPlaceholder')}
                   />
                 </div>
                 <div>
-                  <label className="block text-sm font-medium mb-1">Role</label>
+                  <label className="block text-sm font-medium mb-1">{t('detail.inviteForm.role')}</label>
                   <select
                     value={inviteRole}
                     onChange={(e) => setInviteRole(e.target.value)}
                     className="w-full px-3 py-2 bg-background border rounded-md text-sm"
                   >
-                    <option value="viewer">Viewer</option>
-                    <option value="operator">Operator</option>
-                    <option value="admin">Admin</option>
+                    <option value="viewer">{t('detail.inviteForm.roles.viewer')}</option>
+                    <option value="operator">{t('detail.inviteForm.roles.operator')}</option>
+                    <option value="admin">{t('detail.inviteForm.roles.admin')}</option>
                   </select>
                 </div>
                 {sendInviteMutation.isError && (
@@ -678,13 +683,13 @@ export default function TenantDetailPage() {
                     disabled={!inviteEmail || sendInviteMutation.isPending}
                     className="px-3 py-1.5 text-xs bg-primary text-primary-foreground rounded-md hover:opacity-90 disabled:opacity-50"
                   >
-                    {sendInviteMutation.isPending ? 'Sending...' : 'Send Invite'}
+                    {sendInviteMutation.isPending ? t('detail.sending') : t('detail.sendInvite')}
                   </button>
                   <button
                     onClick={() => { setShowInviteForm(false); setInviteEmail(''); }}
                     className="px-3 py-1.5 text-xs border rounded-md hover:bg-muted"
                   >
-                    Cancel
+                    {tc('cancel')}
                   </button>
                 </div>
               </div>
@@ -692,17 +697,17 @@ export default function TenantDetailPage() {
 
             {invites.length === 0 ? (
               <p className="text-sm text-muted-foreground py-4 text-center">
-                No invitations sent yet.
+                {t('detail.noInvitations')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Email</th>
-                      <th className="text-left px-3 py-2 font-medium">Role</th>
-                      <th className="text-left px-3 py-2 font-medium">Status</th>
-                      <th className="text-right px-3 py-2 font-medium">Actions</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.invitesTable.email')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.invitesTable.role')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.invitesTable.status')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('detail.invitesTable.actions')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -728,7 +733,7 @@ export default function TenantDetailPage() {
                               disabled={revokeInviteMutation.isPending}
                               className="px-2 py-1 text-xs text-red-600 hover:bg-red-50 dark:hover:bg-red-900/20 rounded"
                             >
-                              Revoke
+                              {t('detail.revoke')}
                             </button>
                           )}
                         </td>
@@ -745,7 +750,7 @@ export default function TenantDetailPage() {
         <div className="space-y-6">
           {/* Quick Actions */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.quickActions')}</h2>
             <div className="space-y-2">
               <button
                 onClick={handleToggleStatus}
@@ -780,8 +785,8 @@ export default function TenantDetailPage() {
                 {suspendMutation.isPending
                   ? 'Updating...'
                   : tenant.status === 'active'
-                    ? 'Suspend Tenant'
-                    : 'Activate Tenant'}
+                    ? t('detail.suspendTenant')
+                    : t('detail.activateTenant')}
               </button>
 
               {suspendMutation.isError && (
@@ -811,7 +816,7 @@ export default function TenantDetailPage() {
                   <line x1="16" x2="8" y1="17" y2="17" />
                   <polyline points="10 9 9 9 8 9" />
                 </svg>
-                View Audit Log
+                {t('detail.viewAuditLog')}
               </button>
 
               <button
@@ -832,7 +837,7 @@ export default function TenantDetailPage() {
                   <path d="M17 3a2.85 2.83 0 1 1 4 4L7.5 20.5 2 22l1.5-5.5Z" />
                   <path d="m15 5 4 4" />
                 </svg>
-                Edit Tenant
+                {t('detail.editTenant')}
               </button>
 
               <button
@@ -856,39 +861,39 @@ export default function TenantDetailPage() {
                   <line x1="10" x2="10" y1="11" y2="17" />
                   <line x1="14" x2="14" y1="11" y2="17" />
                 </svg>
-                Delete Tenant
+                {t('detail.deleteTenant')}
               </button>
             </div>
           </div>
 
           {/* Tenant Metadata */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Metadata</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.metadata')}</h2>
             <div className="space-y-3">
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Tenant ID</span>
+                <span className="text-sm text-muted-foreground">{t('detail.tenantId')}</span>
                 <code className="text-xs font-mono text-muted-foreground bg-muted px-1.5 py-0.5 rounded">
                   {tenant.id}
                 </code>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Slug</span>
+                <span className="text-sm text-muted-foreground">{t('detail.slug')}</span>
                 <span className="text-sm font-mono">{tenant.slug}</span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Schema</span>
+                <span className="text-sm text-muted-foreground">{t('detail.schema')}</span>
                 <code className="text-xs font-mono text-muted-foreground bg-muted px-1.5 py-0.5 rounded">
                   {tenant.schemaName}
                 </code>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Created</span>
+                <span className="text-sm text-muted-foreground">{tc('created')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(tenant.createdAt)}
                 </span>
               </div>
               <div className="flex items-center justify-between">
-                <span className="text-sm text-muted-foreground">Updated</span>
+                <span className="text-sm text-muted-foreground">{tc('updated')}</span>
                 <span className="text-xs text-muted-foreground">
                   {formatDate(tenant.updatedAt)}
                 </span>
diff --git a/it0-web-admin/src/app/(admin)/tenants/page.tsx b/it0-web-admin/src/app/(admin)/tenants/page.tsx
index c2c34ae..1b4afe1 100644
--- a/it0-web-admin/src/app/(admin)/tenants/page.tsx
+++ b/it0-web-admin/src/app/(admin)/tenants/page.tsx
@@ -2,6 +2,7 @@
 
 import { useState } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { format } from 'date-fns';
@@ -64,6 +65,8 @@ function slugify(value: string) {
 /* ------------------------------------------------------------------ */
 
 export default function TenantsPage() {
+  const { t } = useTranslation('tenants');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
 
   /* ---- local state ---- */
@@ -127,10 +130,10 @@ export default function TenantsPage() {
     if (!slugTouched) setFormSlug(slugify(value));
   }
 
-  function startEdit(t: Tenant) {
-    setEditingId(t.id);
-    setEditPlan(t.plan);
-    setEditQuota({ ...t.quota });
+  function startEdit(tenant: Tenant) {
+    setEditingId(tenant.id);
+    setEditPlan(tenant.plan);
+    setEditQuota({ ...tenant.quota });
   }
 
   function saveEdit(id: string) {
@@ -146,16 +149,16 @@ export default function TenantsPage() {
       {/* Header */}
       <div className="flex justify-between items-center mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Tenant Management</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage tenants, plans, and resource quotas.
+            {t('subtitle')}
           </p>
         </div>
         <button
           onClick={() => setShowCreate(true)}
           className="px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm font-medium hover:opacity-90"
         >
-          + New Tenant
+          {t('newTenant')}
         </button>
       </div>
 
@@ -163,9 +166,9 @@ export default function TenantsPage() {
       {showCreate && (
         <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50">
           <div className="bg-card border rounded-lg shadow-lg w-full max-w-md p-6">
-            <h2 className="text-lg font-semibold mb-4">Create New Tenant</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('createTenant')}</h2>
 
-            <label className="block text-sm font-medium mb-1">Name *</label>
+            <label className="block text-sm font-medium mb-1">{t('form.name')} *</label>
             <input
               className="w-full border rounded-md px-3 py-2 mb-3 bg-background text-sm"
               value={formName}
@@ -173,7 +176,7 @@ export default function TenantsPage() {
               placeholder="Acme Corp"
             />
 
-            <label className="block text-sm font-medium mb-1">Slug</label>
+            <label className="block text-sm font-medium mb-1">{t('form.slug')}</label>
             <input
               className="w-full border rounded-md px-3 py-2 mb-3 bg-background text-sm"
               value={formSlug}
@@ -181,18 +184,18 @@ export default function TenantsPage() {
               placeholder="acme-corp"
             />
 
-            <label className="block text-sm font-medium mb-1">Plan</label>
+            <label className="block text-sm font-medium mb-1">{t('form.plan')}</label>
             <select
               className="w-full border rounded-md px-3 py-2 mb-3 bg-background text-sm"
               value={formPlan}
               onChange={(e) => setFormPlan(e.target.value as Tenant['plan'])}
             >
               {PLANS.map((p) => (
-                <option key={p} value={p}>{p.charAt(0).toUpperCase() + p.slice(1)}</option>
+                <option key={p} value={p}>{t(`plans.${p}`)}</option>
               ))}
             </select>
 
-            <label className="block text-sm font-medium mb-1">Admin Email *</label>
+            <label className="block text-sm font-medium mb-1">{t('form.adminEmail')} *</label>
             <input
               className="w-full border rounded-md px-3 py-2 mb-4 bg-background text-sm"
               type="email"
@@ -206,7 +209,7 @@ export default function TenantsPage() {
                 onClick={resetCreateForm}
                 className="px-4 py-2 text-sm border rounded-md hover:bg-muted"
               >
-                Cancel
+                {tc('cancel')}
               </button>
               <button
                 disabled={!formName || !formEmail || createMutation.isPending}
@@ -220,7 +223,7 @@ export default function TenantsPage() {
                 }
                 className="px-4 py-2 text-sm bg-primary text-primary-foreground rounded-md hover:opacity-90 disabled:opacity-50"
               >
-                {createMutation.isPending ? 'Creating...' : 'Create Tenant'}
+                {createMutation.isPending ? t('createDialog.creating') : t('createDialog.create')}
               </button>
             </div>
 
@@ -234,8 +237,8 @@ export default function TenantsPage() {
       )}
 
       {/* ---- Loading / Error ---- */}
-      {isLoading && <p className="text-muted-foreground">Loading tenants...</p>}
-      {error && <p className="text-red-500">Failed to load tenants: {(error as Error).message}</p>}
+      {isLoading && <p className="text-muted-foreground">{t('loading')}</p>}
+      {error && <p className="text-red-500">{t('loadError')} {(error as Error).message}</p>}
 
       {/* ---- Tenant Table ---- */}
       {!isLoading && !error && (
@@ -243,94 +246,94 @@ export default function TenantsPage() {
           <table className="w-full text-sm">
             <thead className="bg-muted/50">
               <tr className="text-left">
-                <th className="px-4 py-3 font-medium">Name</th>
-                <th className="px-4 py-3 font-medium">Slug</th>
-                <th className="px-4 py-3 font-medium">Plan</th>
-                <th className="px-4 py-3 font-medium">Status</th>
-                <th className="px-4 py-3 font-medium text-right">Users</th>
-                <th className="px-4 py-3 font-medium">Created</th>
-                <th className="px-4 py-3 font-medium text-right">Actions</th>
+                <th className="px-4 py-3 font-medium">{t('table.name')}</th>
+                <th className="px-4 py-3 font-medium">{t('table.slug')}</th>
+                <th className="px-4 py-3 font-medium">{t('table.plan')}</th>
+                <th className="px-4 py-3 font-medium">{t('table.status')}</th>
+                <th className="px-4 py-3 font-medium text-right">{t('table.users')}</th>
+                <th className="px-4 py-3 font-medium">{t('table.created')}</th>
+                <th className="px-4 py-3 font-medium text-right">{t('table.actions')}</th>
               </tr>
             </thead>
             <tbody className="divide-y">
-              {tenants.map((t) => (
+              {tenants.map((tenant) => (
                 <>
                   {/* Main row */}
-                  <tr key={t.id} className="hover:bg-muted/30">
-                    <td className="px-4 py-3 font-medium">{t.name}</td>
-                    <td className="px-4 py-3 text-muted-foreground">{t.slug}</td>
+                  <tr key={tenant.id} className="hover:bg-muted/30">
+                    <td className="px-4 py-3 font-medium">{tenant.name}</td>
+                    <td className="px-4 py-3 text-muted-foreground">{tenant.slug}</td>
                     <td className="px-4 py-3">
-                      {editingId === t.id ? (
+                      {editingId === tenant.id ? (
                         <select
                           className="border rounded px-2 py-1 text-xs bg-background"
                           value={editPlan}
                           onChange={(e) => setEditPlan(e.target.value as Tenant['plan'])}
                         >
                           {PLANS.map((p) => (
-                            <option key={p} value={p}>{p.charAt(0).toUpperCase() + p.slice(1)}</option>
+                            <option key={p} value={p}>{t(`plans.${p}`)}</option>
                           ))}
                         </select>
                       ) : (
-                        <span className={`inline-block px-2 py-0.5 rounded-full text-xs font-medium ${planBadge[t.plan]}`}>
-                          {t.plan}
+                        <span className={`inline-block px-2 py-0.5 rounded-full text-xs font-medium ${planBadge[tenant.plan]}`}>
+                          {tenant.plan}
                         </span>
                       )}
                     </td>
                     <td className="px-4 py-3">
-                      <span className={`inline-block px-2 py-0.5 rounded-full text-xs font-medium ${statusBadge[t.status]}`}>
-                        {t.status}
+                      <span className={`inline-block px-2 py-0.5 rounded-full text-xs font-medium ${statusBadge[tenant.status]}`}>
+                        {tenant.status}
                       </span>
                     </td>
-                    <td className="px-4 py-3 text-right">{t.userCount}</td>
+                    <td className="px-4 py-3 text-right">{tenant.userCount}</td>
                     <td className="px-4 py-3 text-muted-foreground">
-                      {format(new Date(t.createdAt), 'MMM d, yyyy')}
+                      {format(new Date(tenant.createdAt), 'MMM d, yyyy')}
                     </td>
                     <td className="px-4 py-3 text-right">
                       <div className="flex justify-end gap-1">
-                        {editingId === t.id ? (
+                        {editingId === tenant.id ? (
                           <>
                             <button
-                              onClick={() => saveEdit(t.id)}
+                              onClick={() => saveEdit(tenant.id)}
                               disabled={updateMutation.isPending}
                               className="px-2 py-1 text-xs bg-primary text-primary-foreground rounded hover:opacity-90 disabled:opacity-50"
                             >
-                              Save
+                              {tc('save')}
                             </button>
                             <button
                               onClick={() => setEditingId(null)}
                               className="px-2 py-1 text-xs border rounded hover:bg-muted"
                             >
-                              Cancel
+                              {tc('cancel')}
                             </button>
                           </>
                         ) : (
                           <>
                             <button
-                              onClick={() => startEdit(t)}
+                              onClick={() => startEdit(tenant)}
                               className="px-2 py-1 text-xs border rounded hover:bg-muted"
                             >
-                              Edit
+                              {tc('edit')}
                             </button>
                             <button
                               onClick={() =>
                                 toggleStatusMutation.mutate({
-                                  id: t.id,
-                                  status: t.status === 'active' ? 'suspended' : 'active',
+                                  id: tenant.id,
+                                  status: tenant.status === 'active' ? 'suspended' : 'active',
                                 })
                               }
                               className={`px-2 py-1 text-xs rounded ${
-                                t.status === 'active'
+                                tenant.status === 'active'
                                   ? 'bg-red-100 text-red-700 hover:bg-red-200 dark:bg-red-900 dark:text-red-300'
                                   : 'bg-green-100 text-green-700 hover:bg-green-200 dark:bg-green-900 dark:text-green-300'
                               }`}
                             >
-                              {t.status === 'active' ? 'Suspend' : 'Activate'}
+                              {tenant.status === 'active' ? t('actions.suspend') : t('actions.activate')}
                             </button>
                             <button
-                              onClick={() => setExpandedId(expandedId === t.id ? null : t.id)}
+                              onClick={() => setExpandedId(expandedId === tenant.id ? null : tenant.id)}
                               className="px-2 py-1 text-xs border rounded hover:bg-muted"
                             >
-                              {expandedId === t.id ? 'Hide Quotas' : 'Quotas'}
+                              {expandedId === tenant.id ? t('actions.hideQuotas') : t('actions.quotas')}
                             </button>
                           </>
                         )}
@@ -339,12 +342,12 @@ export default function TenantsPage() {
                   </tr>
 
                   {/* Expanded quota row */}
-                  {expandedId === t.id && (
-                    <tr key={`${t.id}-quota`} className="bg-muted/20">
+                  {expandedId === tenant.id && (
+                    <tr key={`${tenant.id}-quota`} className="bg-muted/20">
                       <td colSpan={7} className="px-4 py-4">
                         <QuotaEditor
-                          quota={editingId === t.id ? editQuota : t.quota}
-                          editable={editingId === t.id}
+                          quota={editingId === tenant.id ? editQuota : tenant.quota}
+                          editable={editingId === tenant.id}
                           onChange={setEditQuota}
                         />
                       </td>
@@ -356,7 +359,7 @@ export default function TenantsPage() {
               {tenants.length === 0 && (
                 <tr>
                   <td colSpan={7} className="px-4 py-8 text-center text-muted-foreground">
-                    No tenants found. Create your first tenant to get started.
+                    {t('empty')}
                   </td>
                 </tr>
               )}
@@ -381,16 +384,18 @@ function QuotaEditor({
   editable: boolean;
   onChange: (q: TenantQuota) => void;
 }) {
+  const { t } = useTranslation('tenants');
+
   const fields: { key: keyof TenantQuota; label: string }[] = [
-    { key: 'maxServers', label: 'Max Servers' },
-    { key: 'maxUsers', label: 'Max Users' },
-    { key: 'maxStandingOrders', label: 'Max Standing Orders' },
-    { key: 'maxAgentTokensPerMonth', label: 'Max Agent Tokens / Month' },
+    { key: 'maxServers', label: t('quotas.maxServers') },
+    { key: 'maxUsers', label: t('quotas.maxUsers') },
+    { key: 'maxStandingOrders', label: t('quotas.maxStandingOrders') },
+    { key: 'maxAgentTokensPerMonth', label: t('quotas.maxAgentTokens') },
   ];
 
   return (
     <div>
-      <h3 className="text-sm font-semibold mb-3">Resource Quotas</h3>
+      <h3 className="text-sm font-semibold mb-3">{t('quotas.title')}</h3>
       <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
         {fields.map(({ key, label }) => (
           <div key={key}>
diff --git a/it0-web-admin/src/app/(admin)/terminal/page.tsx b/it0-web-admin/src/app/(admin)/terminal/page.tsx
index 6a2c136..17343c1 100644
--- a/it0-web-admin/src/app/(admin)/terminal/page.tsx
+++ b/it0-web-admin/src/app/(admin)/terminal/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useEffect, useRef, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { useQuery } from '@tanstack/react-query';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
@@ -69,22 +70,23 @@ function getWsBaseUrl(): string {
 // ---------------------------------------------------------------------------
 
 function StatusDot({ status }: { status: ConnectionStatus }) {
+  const { t } = useTranslation('terminal');
   const colorMap: Record<ConnectionStatus, string> = {
     connected: 'bg-green-500',
     connecting: 'bg-yellow-500 animate-pulse',
     disconnected: 'bg-red-500',
   };
 
-  const labelMap: Record<ConnectionStatus, string> = {
-    connected: 'Connected',
-    connecting: 'Connecting...',
-    disconnected: 'Disconnected',
+  const labelKeyMap: Record<ConnectionStatus, string> = {
+    connected: 'connection.connected',
+    connecting: 'connection.connecting',
+    disconnected: 'connection.disconnected',
   };
 
   return (
     <span className="inline-flex items-center gap-1.5 text-xs text-muted-foreground">
       <span className={cn('w-2 h-2 rounded-full inline-block', colorMap[status])} />
-      {labelMap[status]}
+      {t(labelKeyMap[status])}
     </span>
   );
 }
@@ -114,6 +116,7 @@ function TerminalLineRow({ line }: { line: TerminalLine }) {
 // ---------------------------------------------------------------------------
 
 export default function TerminalPage() {
+  const { t } = useTranslation('terminal');
   // ---- State ----
   const [selectedServerId, setSelectedServerId] = useState<string>('');
   const [connectionStatus, setConnectionStatus] = useState<ConnectionStatus>('disconnected');
@@ -164,7 +167,7 @@ export default function TerminalPage() {
 
     const token = localStorage.getItem('access_token');
     if (!token) {
-      addLine('error', 'No authentication token found. Please log in first.');
+      addLine('error', t('messages.noAuthToken'));
       return;
     }
 
@@ -172,7 +175,7 @@ export default function TerminalPage() {
     const hostname = selectedServer?.hostname ?? selectedServerId;
 
     setConnectionStatus('connecting');
-    addLine('system', `Connecting to ${hostname} (${selectedServer?.host ?? '...'})...`);
+    addLine('system', t('messages.connecting', { hostname, host: selectedServer?.host ?? '...' }));
 
     const wsBase = getWsBaseUrl();
     const wsUrl = `${wsBase}/ws/terminal?serverId=${encodeURIComponent(selectedServerId)}&token=${encodeURIComponent(token)}`;
@@ -181,7 +184,7 @@ export default function TerminalPage() {
 
     ws.onopen = () => {
       setConnectionStatus('connected');
-      addLine('system', `Connected to ${hostname}. Type commands below.`);
+      addLine('system', t('messages.connectedTo', { hostname }));
       inputRef.current?.focus();
     };
 
@@ -192,7 +195,7 @@ export default function TerminalPage() {
         if (parsed.type === 'output') {
           text = parsed.data ?? '';
         } else if (parsed.type === 'error') {
-          addLine('error', parsed.data ?? parsed.message ?? 'Unknown error');
+          addLine('error', parsed.data ?? parsed.message ?? t('messages.unknownError'));
           return;
         } else {
           text = parsed.data ?? event.data;
@@ -207,16 +210,16 @@ export default function TerminalPage() {
     };
 
     ws.onerror = () => {
-      addLine('error', 'WebSocket error occurred.');
+      addLine('error', t('messages.wsError'));
     };
 
     ws.onclose = (event) => {
       setConnectionStatus('disconnected');
       const reason = event.reason ? ` Reason: ${event.reason}` : '';
-      addLine('system', `Disconnected from ${hostname} (code ${event.code}).${reason}`);
+      addLine('system', t('messages.disconnectedFrom', { hostname, code: event.code, reason }));
       wsRef.current = null;
     };
-  }, [selectedServerId, servers, addLine]);
+  }, [selectedServerId, servers, addLine, t]);
 
   // ---- Disconnect ----
   const disconnect = useCallback(() => {
@@ -231,7 +234,7 @@ export default function TerminalPage() {
   const sendCommand = useCallback(
     (command: string) => {
       if (!wsRef.current || wsRef.current.readyState !== WebSocket.OPEN) {
-        addLine('error', 'Not connected. Please connect to a server first.');
+        addLine('error', t('messages.notConnected'));
         return;
       }
       addLine('input', command);
@@ -245,7 +248,7 @@ export default function TerminalPage() {
       });
       setHistoryIndex(-1);
     },
-    [addLine],
+    [addLine, t],
   );
 
   // ---- Handle input key events ----
@@ -299,9 +302,9 @@ export default function TerminalPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Terminal</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Remote shell access
+            {t('subtitle')}
           </p>
         </div>
         <StatusDot status={connectionStatus} />
@@ -312,7 +315,7 @@ export default function TerminalPage() {
         {/* Server selector */}
         <div className="flex items-center gap-2 flex-1 min-w-0">
           <label htmlFor="server-select" className="text-sm font-medium whitespace-nowrap">
-            Server:
+            {t('server.label')}
           </label>
           <select
             id="server-select"
@@ -325,7 +328,7 @@ export default function TerminalPage() {
             )}
           >
             <option value="">
-              {serversLoading ? 'Loading servers...' : 'Select a server'}
+              {serversLoading ? t('server.loadingServers') : t('server.selectServer')}
             </option>
             {servers.map((server) => (
               <option key={server.id} value={server.id}>
@@ -348,7 +351,7 @@ export default function TerminalPage() {
                 'disabled:opacity-50 disabled:cursor-not-allowed',
               )}
             >
-              Connect
+              {t('actions.connect')}
             </button>
           )}
           {(connectionStatus === 'connected' || connectionStatus === 'connecting') && (
@@ -359,15 +362,15 @@ export default function TerminalPage() {
                 'bg-destructive text-destructive-foreground hover:bg-destructive/90',
               )}
             >
-              Disconnect
+              {t('actions.disconnect')}
             </button>
           )}
           <button
             onClick={() => setLines([])}
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent transition-colors"
-            title="Clear terminal output"
+            title={t('shortcuts.clearTerminal')}
           >
-            Clear
+            {t('actions.clear')}
           </button>
         </div>
       </div>
@@ -382,8 +385,8 @@ export default function TerminalPage() {
           <span className="ml-3 text-xs text-gray-400 font-mono select-none">
             {selectedServer
               ? `${selectedServer.hostname} (${selectedServer.host})`
-              : 'No server selected'}
-            {connectionStatus === 'connected' && ' - connected'}
+              : t('noServerSelected')}
+            {connectionStatus === 'connected' && ` - ${t('connection.connected').toLowerCase()}`}
           </span>
         </div>
 
@@ -395,8 +398,8 @@ export default function TerminalPage() {
           {lines.length === 0 && (
             <div className="text-gray-600 select-none">
               {connectionStatus === 'connected'
-                ? 'Terminal ready. Type a command and press Enter.'
-                : 'Select a server and click Connect to start a terminal session.'}
+                ? t('readyMessage')
+                : t('selectServerPrompt')}
             </div>
           )}
           {lines.map((line) => (
@@ -420,8 +423,8 @@ export default function TerminalPage() {
             disabled={connectionStatus !== 'connected'}
             placeholder={
               connectionStatus === 'connected'
-                ? 'Type a command...'
-                : 'Connect to a server to start typing'
+                ? t('placeholder')
+                : t('placeholderDisconnected')
             }
             className={cn(
               'bg-transparent text-green-400 font-mono text-sm flex-1 outline-none',
@@ -436,13 +439,13 @@ export default function TerminalPage() {
       {/* Keyboard shortcuts hint */}
       <div className="mt-2 flex flex-wrap gap-x-4 gap-y-1 text-xs text-muted-foreground">
         <span>
-          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Enter</kbd> Send command
+          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Enter</kbd> {t('shortcuts.sendCommand')}
         </span>
         <span>
-          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Up/Down</kbd> Command history
+          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Up/Down</kbd> {t('shortcuts.commandHistory')}
         </span>
         <span>
-          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Ctrl+L</kbd> Clear terminal
+          <kbd className="px-1.5 py-0.5 rounded bg-muted text-[10px] font-mono">Ctrl+L</kbd> {t('shortcuts.clearTerminal')}
         </span>
       </div>
     </div>
diff --git a/it0-web-admin/src/app/(admin)/users/[id]/page.tsx b/it0-web-admin/src/app/(admin)/users/[id]/page.tsx
index 47755a3..c5b1781 100644
--- a/it0-web-admin/src/app/(admin)/users/[id]/page.tsx
+++ b/it0-web-admin/src/app/(admin)/users/[id]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter, useParams } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -44,21 +45,6 @@ interface EditFormData {
   status: 'active' | 'disabled';
 }
 
-// ---------------------------------------------------------------------------
-// Constants
-// ---------------------------------------------------------------------------
-
-const ROLES: { value: UserDetail['role']; label: string }[] = [
-  { value: 'admin', label: 'Admin' },
-  { value: 'operator', label: 'Operator' },
-  { value: 'viewer', label: 'Viewer' },
-];
-
-const STATUSES: { value: UserDetail['status']; label: string }[] = [
-  { value: 'active', label: 'Active' },
-  { value: 'disabled', label: 'Disabled' },
-];
-
 // ---------------------------------------------------------------------------
 // Helpers
 // ---------------------------------------------------------------------------
@@ -211,20 +197,22 @@ function DeleteDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete User</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteDialog.title')}</h2>
         <p className="text-sm text-muted-foreground mb-4">
-          Are you sure you want to delete <strong>{userName}</strong>? This action cannot be
-          undone.
+          {t('deleteDialog.message')}
         </p>
 
         <div className="p-3 mb-4 rounded-md bg-muted text-xs text-muted-foreground">
-          The user will lose all access and their sessions will be terminated immediately.
+          {t('deleteDialog.warning')}
         </div>
 
         <div className="flex justify-end gap-3">
@@ -233,14 +221,14 @@ function DeleteDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -267,33 +255,35 @@ function ResetPasswordDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Reset Password</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('detail.resetPasswordDialog.title')}</h2>
 
         {success ? (
           <>
             <div className="p-3 mb-4 rounded-md border border-green-200 bg-green-50 text-green-800 dark:border-green-800 dark:bg-green-900/20 dark:text-green-400 text-sm">
-              A password reset link has been sent to <strong>{userName}</strong>&apos;s email address.
+              {t('detail.resetPasswordDialog.success')}
             </div>
             <div className="flex justify-end">
               <button
                 onClick={onClose}
                 className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90"
               >
-                Done
+                {t('detail.resetPasswordDialog.done')}
               </button>
             </div>
           </>
         ) : (
           <>
             <p className="text-sm text-muted-foreground mb-4">
-              This will send a password reset link to <strong>{userName}</strong>&apos;s email
-              address. The user will need to set a new password.
+              {t('detail.resetPasswordDialog.message')}
             </p>
             <div className="flex justify-end gap-3">
               <button
@@ -301,14 +291,14 @@ function ResetPasswordDialog({
                 className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
                 disabled={resetting}
               >
-                Cancel
+                {tc('cancel')}
               </button>
               <button
                 onClick={onConfirm}
                 disabled={resetting}
                 className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
               >
-                {resetting ? 'Sending...' : 'Send Reset Link'}
+                {resetting ? t('detail.resetPasswordDialog.sending') : t('detail.resetPasswordDialog.sendResetLink')}
               </button>
             </div>
           </>
@@ -323,11 +313,24 @@ function ResetPasswordDialog({
 // ---------------------------------------------------------------------------
 
 export default function UserDetailPage() {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
   const router = useRouter();
   const params = useParams();
   const queryClient = useQueryClient();
   const id = params.id as string;
 
+  const ROLES: { value: UserDetail['role']; label: string }[] = [
+    { value: 'admin', label: t('roles.admin') },
+    { value: 'operator', label: t('roles.operator') },
+    { value: 'viewer', label: t('roles.viewer') },
+  ];
+
+  const STATUSES: { value: UserDetail['status']; label: string }[] = [
+    { value: 'active', label: t('statuses.active') },
+    { value: 'disabled', label: t('statuses.disabled') },
+  ];
+
   // State ----------------------------------------------------------------
   const [isEditing, setIsEditing] = useState(false);
   const [deleteOpen, setDeleteOpen] = useState(false);
@@ -424,10 +427,10 @@ export default function UserDetailPage() {
 
   const validate = useCallback((): boolean => {
     const next: Partial<Record<keyof EditFormData, string>> = {};
-    if (!form.displayName.trim()) next.displayName = 'Display name is required';
+    if (!form.displayName.trim()) next.displayName = t('validation.displayNameRequired');
     setErrors(next);
     return Object.keys(next).length === 0;
-  }, [form]);
+  }, [form, t]);
 
   const handleSave = useCallback(() => {
     if (!validate()) return;
@@ -458,10 +461,10 @@ export default function UserDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Users
+          {t('detail.backToUsers')}
         </button>
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading user details...
+          {t('detail.loading')}
         </div>
       </div>
     );
@@ -479,10 +482,10 @@ export default function UserDetailPage() {
             <path d="M19 12H5" />
             <path d="m12 19-7-7 7-7" />
           </svg>
-          Back to Users
+          {t('detail.backToUsers')}
         </button>
         <div className="p-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load user: {(error as Error).message}
+          {t('detail.loadError')} {(error as Error).message}
         </div>
       </div>
     );
@@ -501,7 +504,7 @@ export default function UserDetailPage() {
           <path d="M19 12H5" />
           <path d="m12 19-7-7 7-7" />
         </svg>
-        Back to Users
+        {t('detail.backToUsers')}
       </button>
 
       {/* Page header */}
@@ -518,13 +521,13 @@ export default function UserDetailPage() {
           {/* User Information Card */}
           <div className="bg-card border rounded-lg p-6">
             <div className="flex items-center justify-between mb-4">
-              <h2 className="text-lg font-semibold">User Information</h2>
+              <h2 className="text-lg font-semibold">{t('detail.userInformation')}</h2>
               {!isEditing && (
                 <button
                   onClick={startEditing}
                   className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                 >
-                  Edit
+                  {tc('edit')}
                 </button>
               )}
             </div>
@@ -535,7 +538,7 @@ export default function UserDetailPage() {
                 {/* displayName */}
                 <div>
                   <label className="block text-sm font-medium mb-1">
-                    Display Name <span className="text-destructive">*</span>
+                    {t('form.displayName')} <span className="text-destructive">*</span>
                   </label>
                   <input
                     type="text"
@@ -554,7 +557,7 @@ export default function UserDetailPage() {
 
                 {/* role */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Role</label>
+                  <label className="block text-sm font-medium mb-1">{t('form.role')}</label>
                   <select
                     value={form.role}
                     onChange={(e) => handleChange('role', e.target.value)}
@@ -570,7 +573,7 @@ export default function UserDetailPage() {
 
                 {/* status */}
                 <div>
-                  <label className="block text-sm font-medium mb-1">Status</label>
+                  <label className="block text-sm font-medium mb-1">{tc('status')}</label>
                   <select
                     value={form.status}
                     onChange={(e) => handleChange('status', e.target.value)}
@@ -587,7 +590,7 @@ export default function UserDetailPage() {
                 {/* Update error */}
                 {updateMutation.isError && (
                   <div className="p-3 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-                    Failed to update user: {(updateMutation.error as Error).message}
+                    {t('detail.failedToUpdate')} {(updateMutation.error as Error).message}
                   </div>
                 )}
 
@@ -599,7 +602,7 @@ export default function UserDetailPage() {
                     className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
                     disabled={updateMutation.isPending}
                   >
-                    Cancel
+                    {tc('cancel')}
                   </button>
                   <button
                     type="button"
@@ -607,43 +610,43 @@ export default function UserDetailPage() {
                     disabled={updateMutation.isPending}
                     className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
                   >
-                    {updateMutation.isPending ? 'Saving...' : 'Save Changes'}
+                    {updateMutation.isPending ? tc('saving') : tc('save')}
                   </button>
                 </div>
               </div>
             ) : (
               /* ---------- Read-only info display ---------- */
               <dl className="divide-y">
-                <InfoRow label="Display Name" value={user.displayName} />
-                <InfoRow label="Email" value={user.email} />
-                <InfoRow label="Role" value={<RoleBadge role={user.role} />} />
-                <InfoRow label="Status" value={<StatusBadge status={user.status} />} />
-                <InfoRow label="Tenant" value={user.tenantName || '--'} />
-                <InfoRow label="Last Login" value={formatDateTime(user.lastLoginAt)} />
-                <InfoRow label="Created" value={formatDateTime(user.createdAt)} />
-                <InfoRow label="Updated" value={formatDateTime(user.updatedAt)} />
+                <InfoRow label={t('form.displayName')} value={user.displayName} />
+                <InfoRow label={t('form.email')} value={user.email} />
+                <InfoRow label={t('form.role')} value={<RoleBadge role={user.role} />} />
+                <InfoRow label={tc('status')} value={<StatusBadge status={user.status} />} />
+                <InfoRow label={t('table.tenant')} value={user.tenantName || '--'} />
+                <InfoRow label={t('table.lastLogin')} value={formatDateTime(user.lastLoginAt)} />
+                <InfoRow label={tc('created')} value={formatDateTime(user.createdAt)} />
+                <InfoRow label={tc('updated')} value={formatDateTime(user.updatedAt)} />
               </dl>
             )}
           </div>
 
           {/* Activity Log */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Activity Log</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.activityLog')}</h2>
 
             {activityLog.length === 0 ? (
               <p className="text-sm text-muted-foreground py-4 text-center">
-                No activity recorded yet.
+                {t('detail.noActivity')}
               </p>
             ) : (
               <div className="overflow-x-auto">
                 <table className="w-full text-sm">
                   <thead>
                     <tr className="border-b bg-muted/50">
-                      <th className="text-left px-3 py-2 font-medium">Action</th>
-                      <th className="text-left px-3 py-2 font-medium">Resource</th>
-                      <th className="text-left px-3 py-2 font-medium">Details</th>
-                      <th className="text-left px-3 py-2 font-medium">IP Address</th>
-                      <th className="text-right px-3 py-2 font-medium">Time</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.activityTable.action')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.activityTable.resource')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.activityTable.details')}</th>
+                      <th className="text-left px-3 py-2 font-medium">{t('detail.activityTable.ipAddress')}</th>
+                      <th className="text-right px-3 py-2 font-medium">{t('detail.activityTable.time')}</th>
                     </tr>
                   </thead>
                   <tbody>
@@ -680,7 +683,7 @@ export default function UserDetailPage() {
         <div className="space-y-6">
           {/* Quick Actions */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Quick Actions</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.quickActions')}</h2>
             <div className="space-y-2">
               <button
                 onClick={startEditing}
@@ -690,7 +693,7 @@ export default function UserDetailPage() {
                   <path d="M17 3a2.85 2.83 0 1 1 4 4L7.5 20.5 2 22l1.5-5.5Z" />
                   <path d="m15 5 4 4" />
                 </svg>
-                Edit User
+                {t('detail.editUser')}
               </button>
               <button
                 onClick={() => {
@@ -703,7 +706,7 @@ export default function UserDetailPage() {
                   <rect width="18" height="11" x="3" y="11" rx="2" ry="2" />
                   <path d="M7 11V7a5 5 0 0 1 10 0v4" />
                 </svg>
-                Reset Password
+                {t('detail.resetPassword')}
               </button>
               <button
                 onClick={() => setDeleteOpen(true)}
@@ -716,36 +719,36 @@ export default function UserDetailPage() {
                   <line x1="10" x2="10" y1="11" y2="17" />
                   <line x1="14" x2="14" y1="11" y2="17" />
                 </svg>
-                Delete User
+                {t('detail.deleteUser')}
               </button>
             </div>
           </div>
 
           {/* Account Summary */}
           <div className="bg-card border rounded-lg p-6">
-            <h2 className="text-lg font-semibold mb-4">Account Summary</h2>
+            <h2 className="text-lg font-semibold mb-4">{t('detail.accountSummary')}</h2>
             <div className="space-y-3">
               <div>
-                <p className="text-sm text-muted-foreground mb-1">Status</p>
+                <p className="text-sm text-muted-foreground mb-1">{tc('status')}</p>
                 <StatusBadge status={user.status} />
               </div>
               <div>
-                <p className="text-sm text-muted-foreground mb-1">Role</p>
+                <p className="text-sm text-muted-foreground mb-1">{tc('role')}</p>
                 <RoleBadge role={user.role} />
               </div>
               <div>
-                <p className="text-sm text-muted-foreground mb-1">Last Login</p>
+                <p className="text-sm text-muted-foreground mb-1">{t('detail.lastLogin')}</p>
                 <p className="text-sm font-medium">
-                  {user.lastLoginAt ? formatDateTime(user.lastLoginAt) : 'Never'}
+                  {user.lastLoginAt ? formatDateTime(user.lastLoginAt) : tc('never')}
                 </p>
               </div>
               <div>
-                <p className="text-sm text-muted-foreground mb-1">Member Since</p>
+                <p className="text-sm text-muted-foreground mb-1">{t('detail.memberSince')}</p>
                 <p className="text-sm font-medium">{formatDate(user.createdAt)}</p>
               </div>
               {user.tenantName && (
                 <div>
-                  <p className="text-sm text-muted-foreground mb-1">Tenant</p>
+                  <p className="text-sm text-muted-foreground mb-1">{t('table.tenant')}</p>
                   <p className="text-sm font-medium">{user.tenantName}</p>
                 </div>
               )}
diff --git a/it0-web-admin/src/app/(admin)/users/page.tsx b/it0-web-admin/src/app/(admin)/users/page.tsx
index bebb88f..4705347 100644
--- a/it0-web-admin/src/app/(admin)/users/page.tsx
+++ b/it0-web-admin/src/app/(admin)/users/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useCallback, useMemo } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useRouter } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 import { queryKeys } from '@/infrastructure/api/query-keys';
 import { cn } from '@/lib/utils';
@@ -45,17 +46,6 @@ interface EditUserFormData {
 // Constants
 // ---------------------------------------------------------------------------
 
-const ROLES: { value: User['role']; label: string }[] = [
-  { value: 'admin', label: 'Admin' },
-  { value: 'operator', label: 'Operator' },
-  { value: 'viewer', label: 'Viewer' },
-];
-
-const STATUSES: { value: User['status']; label: string }[] = [
-  { value: 'active', label: 'Active' },
-  { value: 'disabled', label: 'Disabled' },
-];
-
 const EMPTY_FORM: UserFormData = {
   displayName: '',
   email: '',
@@ -167,20 +157,29 @@ function AddUserDialog({
   onChange: (field: keyof UserFormData, value: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
+  const ROLES: { value: User['role']; label: string }[] = [
+    { value: 'admin', label: t('roles.admin') },
+    { value: 'operator', label: t('roles.operator') },
+    { value: 'viewer', label: t('roles.viewer') },
+  ];
+
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
 
       <div className="relative z-10 w-full max-w-lg bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-4">Add User</h2>
+        <h2 className="text-lg font-semibold mb-4">{t('createDialog.title')}</h2>
 
         <div className="space-y-4 max-h-[70vh] overflow-y-auto pr-1">
           {/* displayName */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Display Name <span className="text-destructive">*</span>
+              {t('form.displayName')} <span className="text-destructive">*</span>
             </label>
             <input
               type="text"
@@ -200,7 +199,7 @@ function AddUserDialog({
           {/* email */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Email <span className="text-destructive">*</span>
+              {t('form.email')} <span className="text-destructive">*</span>
             </label>
             <input
               type="email"
@@ -220,7 +219,7 @@ function AddUserDialog({
           {/* password */}
           <div>
             <label className="block text-sm font-medium mb-1">
-              Password <span className="text-destructive">*</span>
+              {t('form.password')} <span className="text-destructive">*</span>
             </label>
             <input
               type="password"
@@ -239,7 +238,7 @@ function AddUserDialog({
 
           {/* role */}
           <div>
-            <label className="block text-sm font-medium mb-1">Role</label>
+            <label className="block text-sm font-medium mb-1">{t('form.role')}</label>
             <select
               value={form.role}
               onChange={(e) => onChange('role', e.target.value)}
@@ -255,7 +254,7 @@ function AddUserDialog({
 
           {/* tenantId */}
           <div>
-            <label className="block text-sm font-medium mb-1">Tenant ID</label>
+            <label className="block text-sm font-medium mb-1">{t('form.tenantId')}</label>
             <input
               type="text"
               value={form.tenantId}
@@ -273,7 +272,7 @@ function AddUserDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -281,7 +280,7 @@ function AddUserDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Creating...' : 'Create User'}
+            {saving ? t('createDialog.creating') : t('createDialog.create')}
           </button>
         </div>
       </div>
@@ -310,21 +309,35 @@ function EditUserDialog({
   onChange: (field: keyof EditUserFormData, value: string) => void;
   onSubmit: () => void;
 }) {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
+  const ROLES: { value: User['role']; label: string }[] = [
+    { value: 'admin', label: t('roles.admin') },
+    { value: 'operator', label: t('roles.operator') },
+    { value: 'viewer', label: t('roles.viewer') },
+  ];
+
+  const STATUSES: { value: User['status']; label: string }[] = [
+    { value: 'active', label: t('statuses.active') },
+    { value: 'disabled', label: t('statuses.disabled') },
+  ];
+
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
 
       <div className="relative z-10 w-full max-w-lg bg-card border rounded-lg shadow-lg p-6 mx-4">
         <h2 className="text-lg font-semibold mb-4">
-          Edit User: <span className="text-muted-foreground">{userName}</span>
+          {t('editDialog.title')} <span className="text-muted-foreground">{userName}</span>
         </h2>
 
         <div className="space-y-4">
           {/* role */}
           <div>
-            <label className="block text-sm font-medium mb-1">Role</label>
+            <label className="block text-sm font-medium mb-1">{t('form.role')}</label>
             <select
               value={form.role}
               onChange={(e) => onChange('role', e.target.value)}
@@ -340,7 +353,7 @@ function EditUserDialog({
 
           {/* status */}
           <div>
-            <label className="block text-sm font-medium mb-1">Status</label>
+            <label className="block text-sm font-medium mb-1">{tc('status')}</label>
             <select
               value={form.status}
               onChange={(e) => onChange('status', e.target.value)}
@@ -362,7 +375,7 @@ function EditUserDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={saving}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             type="button"
@@ -370,7 +383,7 @@ function EditUserDialog({
             disabled={saving}
             className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
           >
-            {saving ? 'Saving...' : 'Save Changes'}
+            {saving ? t('editDialog.saving') : t('editDialog.save')}
           </button>
         </div>
       </div>
@@ -395,20 +408,22 @@ function DeleteUserDialog({
   onClose: () => void;
   onConfirm: () => void;
 }) {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
+
   if (!open) return null;
 
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center">
       <div className="absolute inset-0 bg-black/50" onClick={onClose} />
       <div className="relative z-10 w-full max-w-sm bg-card border rounded-lg shadow-lg p-6 mx-4">
-        <h2 className="text-lg font-semibold mb-2">Delete User</h2>
+        <h2 className="text-lg font-semibold mb-2">{t('deleteDialog.title')}</h2>
         <p className="text-sm text-muted-foreground mb-4">
-          Are you sure you want to delete <strong>{userName}</strong>? This action cannot be
-          undone.
+          {t('deleteDialog.message')}
         </p>
 
         <div className="p-3 mb-4 rounded-md bg-muted text-xs text-muted-foreground">
-          The user will lose all access and their sessions will be terminated immediately.
+          {t('deleteDialog.warning')}
         </div>
 
         <div className="flex justify-end gap-3">
@@ -417,14 +432,14 @@ function DeleteUserDialog({
             className="px-4 py-2 text-sm rounded-md border border-input hover:bg-accent"
             disabled={deleting}
           >
-            Cancel
+            {tc('cancel')}
           </button>
           <button
             onClick={onConfirm}
             disabled={deleting}
             className="px-4 py-2 text-sm rounded-md bg-destructive text-destructive-foreground hover:bg-destructive/90 disabled:opacity-50"
           >
-            {deleting ? 'Deleting...' : 'Delete'}
+            {deleting ? tc('deleting') : tc('delete')}
           </button>
         </div>
       </div>
@@ -437,6 +452,8 @@ function DeleteUserDialog({
 // ---------------------------------------------------------------------------
 
 export default function UsersPage() {
+  const { t } = useTranslation('users');
+  const { t: tc } = useTranslation('common');
   const queryClient = useQueryClient();
   const router = useRouter();
 
@@ -453,6 +470,17 @@ export default function UsersPage() {
   const [roleFilter, setRoleFilter] = useState<string>('all');
   const [statusFilter, setStatusFilter] = useState<string>('all');
 
+  const ROLES: { value: User['role']; label: string }[] = [
+    { value: 'admin', label: t('roles.admin') },
+    { value: 'operator', label: t('roles.operator') },
+    { value: 'viewer', label: t('roles.viewer') },
+  ];
+
+  const STATUSES: { value: User['status']; label: string }[] = [
+    { value: 'active', label: t('statuses.active') },
+    { value: 'disabled', label: t('statuses.disabled') },
+  ];
+
   // Queries --------------------------------------------------------------
   const { data: usersData, isLoading, error } = useQuery({
     queryKey: queryKeys.users.list(),
@@ -516,14 +544,14 @@ export default function UsersPage() {
   // Helpers --------------------------------------------------------------
   const validateAdd = useCallback((): boolean => {
     const next: Partial<Record<keyof UserFormData, string>> = {};
-    if (!form.displayName.trim()) next.displayName = 'Display name is required';
-    if (!form.email.trim()) next.email = 'Email is required';
-    if (!form.password.trim()) next.password = 'Password is required';
+    if (!form.displayName.trim()) next.displayName = t('validation.displayNameRequired');
+    if (!form.email.trim()) next.email = t('validation.emailRequired');
+    if (!form.password.trim()) next.password = t('validation.passwordRequired');
     if (form.password.trim() && form.password.trim().length < 8)
       next.password = 'Password must be at least 8 characters';
     setErrors(next);
     return Object.keys(next).length === 0;
-  }, [form]);
+  }, [form, t]);
 
   const closeAddDialog = useCallback(() => {
     setAddDialogOpen(false);
@@ -598,16 +626,16 @@ export default function UsersPage() {
       {/* Header */}
       <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4 mb-6">
         <div>
-          <h1 className="text-2xl font-bold">Users</h1>
+          <h1 className="text-2xl font-bold">{t('title')}</h1>
           <p className="text-sm text-muted-foreground mt-1">
-            Manage user accounts and access
+            {t('subtitle')}
           </p>
         </div>
         <button
           onClick={openAdd}
           className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 whitespace-nowrap"
         >
-          Add User
+          {t('addUser')}
         </button>
       </div>
 
@@ -620,7 +648,7 @@ export default function UsersPage() {
             value={search}
             onChange={(e) => setSearch(e.target.value)}
             className="w-full px-3 py-2 rounded-md border border-input bg-background text-sm"
-            placeholder="Search by name or email..."
+            placeholder={t('searchPlaceholder')}
           />
         </div>
 
@@ -635,7 +663,7 @@ export default function UsersPage() {
                 : 'text-muted-foreground hover:text-foreground',
             )}
           >
-            All Roles
+            {t('allRoles')}
           </button>
           {ROLES.map((r) => (
             <button
@@ -664,7 +692,7 @@ export default function UsersPage() {
                 : 'text-muted-foreground hover:text-foreground',
             )}
           >
-            All
+            {tc('all')}
           </button>
           {STATUSES.map((s) => (
             <button
@@ -686,14 +714,14 @@ export default function UsersPage() {
       {/* Error state */}
       {error && (
         <div className="p-4 mb-4 rounded-md border border-destructive/50 bg-destructive/10 text-destructive text-sm">
-          Failed to load users: {(error as Error).message}
+          {t('loadError')} {(error as Error).message}
         </div>
       )}
 
       {/* Loading state */}
       {isLoading && (
         <div className="text-sm text-muted-foreground py-12 text-center">
-          Loading users...
+          {t('loading')}
         </div>
       )}
 
@@ -704,14 +732,14 @@ export default function UsersPage() {
             <table className="w-full text-sm">
               <thead>
                 <tr className="border-b bg-muted/50">
-                  <th className="text-left px-4 py-3 font-medium">Name</th>
-                  <th className="text-left px-4 py-3 font-medium">Email</th>
-                  <th className="text-left px-4 py-3 font-medium">Role</th>
-                  <th className="text-left px-4 py-3 font-medium">Tenant</th>
-                  <th className="text-left px-4 py-3 font-medium">Status</th>
-                  <th className="text-left px-4 py-3 font-medium">Last Login</th>
-                  <th className="text-left px-4 py-3 font-medium">Created</th>
-                  <th className="text-right px-4 py-3 font-medium">Actions</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.name')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.email')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.role')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.tenant')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.status')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.lastLogin')}</th>
+                  <th className="text-left px-4 py-3 font-medium">{t('table.created')}</th>
+                  <th className="text-right px-4 py-3 font-medium">{t('table.actions')}</th>
                 </tr>
               </thead>
               <tbody>
@@ -722,8 +750,8 @@ export default function UsersPage() {
                       className="text-center text-muted-foreground py-12"
                     >
                       {allUsers.length === 0
-                        ? 'No users found. Add one to get started.'
-                        : 'No users match the current filters.'}
+                        ? t('empty')
+                        : t('noMatchingFilters')}
                     </td>
                   </tr>
                 ) : (
@@ -764,19 +792,19 @@ export default function UsersPage() {
                             onClick={() => router.push(`/users/${user.id}`)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            View
+                            {tc('view')}
                           </button>
                           <button
                             onClick={() => openEdit(user)}
                             className="px-3 py-1 text-xs rounded-md border border-input hover:bg-accent transition-colors"
                           >
-                            Edit
+                            {tc('edit')}
                           </button>
                           <button
                             onClick={() => setDeleteTarget(user)}
                             className="px-3 py-1 text-xs rounded-md border border-destructive/50 text-destructive hover:bg-destructive/10 transition-colors"
                           >
-                            Delete
+                            {tc('delete')}
                           </button>
                         </div>
                       </td>
@@ -792,7 +820,7 @@ export default function UsersPage() {
       {/* Results count */}
       {!isLoading && !error && allUsers.length > 0 && (
         <div className="mt-3 text-xs text-muted-foreground">
-          Showing {filteredUsers.length} of {allUsers.length} user{allUsers.length !== 1 ? 's' : ''}
+          {t('showing', { count: filteredUsers.length, total: allUsers.length })}
         </div>
       )}
 
diff --git a/it0-web-admin/src/app/(auth)/invite/[token]/page.tsx b/it0-web-admin/src/app/(auth)/invite/[token]/page.tsx
index c3f8985..2d63971 100644
--- a/it0-web-admin/src/app/(auth)/invite/[token]/page.tsx
+++ b/it0-web-admin/src/app/(auth)/invite/[token]/page.tsx
@@ -3,6 +3,7 @@
 import { useState, useEffect } from 'react';
 import { useRouter, useParams } from 'next/navigation';
 import Link from 'next/link';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 
 interface InviteInfo {
@@ -22,6 +23,8 @@ export default function AcceptInvitePage() {
   const router = useRouter();
   const params = useParams();
   const token = params.token as string;
+  const { t } = useTranslation('auth');
+  const { t: tc } = useTranslation('common');
 
   const [invite, setInvite] = useState<InviteInfo | null>(null);
   const [loading, setLoading] = useState(true);
@@ -39,22 +42,18 @@ export default function AcceptInvitePage() {
         const data = await apiClient<InviteInfo>(`/api/v1/auth/invite/${token}`);
         setInvite(data);
       } catch (err) {
-        setError(err instanceof Error ? err.message : 'Invalid invitation');
+        setError(err instanceof Error ? err.message : t('inviteInvalid'));
       } finally {
         setLoading(false);
       }
     }
     validateInvite();
-  }, [token]);
+  }, [token, t]);
 
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     if (password !== confirmPassword) {
-      setSubmitError('Passwords do not match');
-      return;
-    }
-    if (password.length < 6) {
-      setSubmitError('Password must be at least 6 characters');
+      setSubmitError(tc('passwordsNoMatch'));
       return;
     }
 
@@ -89,7 +88,7 @@ export default function AcceptInvitePage() {
   if (loading) {
     return (
       <div className="w-full max-w-md p-8 bg-card rounded-lg border text-center">
-        <p className="text-muted-foreground">Validating invitation...</p>
+        <p className="text-muted-foreground">{t('validatingInvite')}</p>
       </div>
     );
   }
@@ -97,13 +96,13 @@ export default function AcceptInvitePage() {
   if (error) {
     return (
       <div className="w-full max-w-md p-8 bg-card rounded-lg border text-center space-y-4">
-        <h1 className="text-xl font-bold text-red-500">Invalid Invitation</h1>
+        <h1 className="text-xl font-bold text-red-500">{t('inviteInvalid')}</h1>
         <p className="text-muted-foreground">{error}</p>
         <Link
           href="/login"
           className="inline-block px-4 py-2 bg-primary text-primary-foreground rounded-md text-sm hover:opacity-90"
         >
-          Go to Login
+          {t('backToLogin')}
         </Link>
       </div>
     );
@@ -112,58 +111,56 @@ export default function AcceptInvitePage() {
   return (
     <div className="w-full max-w-md p-8 space-y-6 bg-card rounded-lg border">
       <div className="text-center">
-        <h1 className="text-3xl font-bold">IT0</h1>
-        <p className="text-muted-foreground mt-2">Accept Invitation</p>
+        <h1 className="text-3xl font-bold">{t('appTitle')}</h1>
+        <p className="text-muted-foreground mt-2">{t('inviteTitle')}</p>
       </div>
 
       <div className="bg-muted/50 rounded-md p-4 space-y-1 text-sm">
         <p>
-          <span className="text-muted-foreground">Organization:</span>{' '}
+          <span className="text-muted-foreground">{t('organizationName')}:</span>{' '}
           <span className="font-medium">{invite?.tenantName}</span>
         </p>
         <p>
-          <span className="text-muted-foreground">Email:</span>{' '}
+          <span className="text-muted-foreground">{t('inviteEmail')}</span>{' '}
           <span className="font-medium">{invite?.email}</span>
         </p>
         <p>
-          <span className="text-muted-foreground">Role:</span>{' '}
+          <span className="text-muted-foreground">{t('inviteRole')}</span>{' '}
           <span className="font-medium capitalize">{invite?.role}</span>
         </p>
       </div>
 
       <form onSubmit={handleSubmit} className="space-y-4">
         <div>
-          <label className="block text-sm font-medium mb-1">Full Name</label>
+          <label className="block text-sm font-medium mb-1">{t('fullName')}</label>
           <input
             type="text"
             value={name}
             onChange={(e) => setName(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="John Doe"
+            placeholder={t('fullNamePlaceholder')}
             required
           />
         </div>
 
         <div>
-          <label className="block text-sm font-medium mb-1">Password</label>
+          <label className="block text-sm font-medium mb-1">{t('password')}</label>
           <input
             type="password"
             value={password}
             onChange={(e) => setPassword(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="At least 6 characters"
             required
           />
         </div>
 
         <div>
-          <label className="block text-sm font-medium mb-1">Confirm Password</label>
+          <label className="block text-sm font-medium mb-1">{t('confirmPassword')}</label>
           <input
             type="password"
             value={confirmPassword}
             onChange={(e) => setConfirmPassword(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="Re-enter your password"
             required
           />
         </div>
@@ -177,14 +174,14 @@ export default function AcceptInvitePage() {
           disabled={isSubmitting}
           className="w-full py-2 bg-primary text-primary-foreground rounded-md hover:opacity-90 disabled:opacity-50 text-sm font-medium"
         >
-          {isSubmitting ? 'Joining...' : 'Join Organization'}
+          {isSubmitting ? t('joining') : t('joinOrganization')}
         </button>
       </form>
 
       <p className="text-center text-sm text-muted-foreground">
-        Already have an account?{' '}
+        {t('haveAccount')}{' '}
         <Link href="/login" className="text-primary hover:underline">
-          Sign in
+          {t('signInLink')}
         </Link>
       </p>
     </div>
diff --git a/it0-web-admin/src/app/(auth)/login/page.tsx b/it0-web-admin/src/app/(auth)/login/page.tsx
index 72929c9..5d8b593 100644
--- a/it0-web-admin/src/app/(auth)/login/page.tsx
+++ b/it0-web-admin/src/app/(auth)/login/page.tsx
@@ -3,6 +3,7 @@
 import { useState } from 'react';
 import { useRouter } from 'next/navigation';
 import Link from 'next/link';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 
 interface LoginResponse {
@@ -13,6 +14,7 @@ interface LoginResponse {
 
 export default function LoginPage() {
   const router = useRouter();
+  const { t } = useTranslation('auth');
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
   const [isLoading, setIsLoading] = useState(false);
@@ -33,7 +35,6 @@ export default function LoginPage() {
       localStorage.setItem('refresh_token', data.refreshToken);
       localStorage.setItem('user', JSON.stringify(data.user));
 
-      // Decode tenantId from JWT and store as current tenant
       try {
         const payload = JSON.parse(atob(data.accessToken.split('.')[1]));
         if (payload.tenantId) {
@@ -43,7 +44,7 @@ export default function LoginPage() {
 
       router.push('/dashboard');
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Login failed');
+      setError(err instanceof Error ? err.message : t('loginFailed'));
     } finally {
       setIsLoading(false);
     }
@@ -52,23 +53,23 @@ export default function LoginPage() {
   return (
     <div className="w-full max-w-md p-8 space-y-6 bg-card rounded-lg border">
       <div className="text-center">
-        <h1 className="text-3xl font-bold">IT0</h1>
-        <p className="text-muted-foreground mt-2">Admin Console</p>
+        <h1 className="text-3xl font-bold">{t('appTitle')}</h1>
+        <p className="text-muted-foreground mt-2">{t('adminConsole')}</p>
       </div>
       <form onSubmit={handleSubmit} className="space-y-4">
         <div>
-          <label className="block text-sm font-medium mb-1">Email</label>
+          <label className="block text-sm font-medium mb-1">{t('email')}</label>
           <input
             type="email"
             value={email}
             onChange={(e) => setEmail(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md"
-            placeholder="admin@example.com"
+            placeholder={t('emailPlaceholder')}
             required
           />
         </div>
         <div>
-          <label className="block text-sm font-medium mb-1">Password</label>
+          <label className="block text-sm font-medium mb-1">{t('password')}</label>
           <input
             type="password"
             value={password}
@@ -85,14 +86,14 @@ export default function LoginPage() {
           disabled={isLoading}
           className="w-full py-2 bg-primary text-primary-foreground rounded-md hover:opacity-90 disabled:opacity-50"
         >
-          {isLoading ? 'Signing in...' : 'Sign In'}
+          {isLoading ? t('signingIn') : t('signIn')}
         </button>
       </form>
 
       <p className="text-center text-sm text-muted-foreground">
-        Don&apos;t have an account?{' '}
+        {t('noAccount')}{' '}
         <Link href="/register" className="text-primary hover:underline">
-          Create one
+          {t('createOne')}
         </Link>
       </p>
     </div>
diff --git a/it0-web-admin/src/app/(auth)/register/page.tsx b/it0-web-admin/src/app/(auth)/register/page.tsx
index 7564370..f60e72c 100644
--- a/it0-web-admin/src/app/(auth)/register/page.tsx
+++ b/it0-web-admin/src/app/(auth)/register/page.tsx
@@ -3,6 +3,7 @@
 import { useState } from 'react';
 import { useRouter } from 'next/navigation';
 import Link from 'next/link';
+import { useTranslation } from 'react-i18next';
 import { apiClient } from '@/infrastructure/api/api-client';
 
 interface RegisterResponse {
@@ -13,6 +14,8 @@ interface RegisterResponse {
 
 export default function RegisterPage() {
   const router = useRouter();
+  const { t } = useTranslation('auth');
+  const { t: tc } = useTranslation('common');
   const [name, setName] = useState('');
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
@@ -24,11 +27,11 @@ export default function RegisterPage() {
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     if (password !== confirmPassword) {
-      setError('Passwords do not match');
+      setError(tc('passwordsNoMatch'));
       return;
     }
     if (password.length < 6) {
-      setError('Password must be at least 6 characters');
+      setError(t('passwordMinLength', 'Password must be at least 6 characters'));
       return;
     }
 
@@ -68,72 +71,70 @@ export default function RegisterPage() {
   return (
     <div className="w-full max-w-md p-8 space-y-6 bg-card rounded-lg border">
       <div className="text-center">
-        <h1 className="text-3xl font-bold">IT0</h1>
-        <p className="text-muted-foreground mt-2">Create your account</p>
+        <h1 className="text-3xl font-bold">{t('appTitle')}</h1>
+        <p className="text-muted-foreground mt-2">{t('createAccount')}</p>
       </div>
 
       <form onSubmit={handleSubmit} className="space-y-4">
         <div>
-          <label className="block text-sm font-medium mb-1">Full Name</label>
+          <label className="block text-sm font-medium mb-1">{t('fullName')}</label>
           <input
             type="text"
             value={name}
             onChange={(e) => setName(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="John Doe"
+            placeholder={t('fullNamePlaceholder')}
             required
           />
         </div>
 
         <div>
-          <label className="block text-sm font-medium mb-1">Email</label>
+          <label className="block text-sm font-medium mb-1">{t('email')}</label>
           <input
             type="email"
             value={email}
             onChange={(e) => setEmail(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="you@example.com"
+            placeholder={t('emailPlaceholder')}
             required
           />
         </div>
 
         <div>
           <label className="block text-sm font-medium mb-1">
-            Organization Name
-            <span className="text-muted-foreground font-normal ml-1">(optional)</span>
+            {t('organizationName')}
+            <span className="text-muted-foreground font-normal ml-1">({tc('optional')})</span>
           </label>
           <input
             type="text"
             value={companyName}
             onChange={(e) => setCompanyName(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="Acme Corp"
+            placeholder={t('organizationNamePlaceholder')}
           />
           <p className="text-xs text-muted-foreground mt-1">
-            Provide a name to create a new organization. Leave blank to join as a viewer.
+            {t('organizationHint')}
           </p>
         </div>
 
         <div>
-          <label className="block text-sm font-medium mb-1">Password</label>
+          <label className="block text-sm font-medium mb-1">{t('password')}</label>
           <input
             type="password"
             value={password}
             onChange={(e) => setPassword(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="At least 6 characters"
             required
           />
         </div>
 
         <div>
-          <label className="block text-sm font-medium mb-1">Confirm Password</label>
+          <label className="block text-sm font-medium mb-1">{t('confirmPassword')}</label>
           <input
             type="password"
             value={confirmPassword}
             onChange={(e) => setConfirmPassword(e.target.value)}
             className="w-full px-3 py-2 bg-input border rounded-md text-sm"
-            placeholder="Re-enter your password"
             required
           />
         </div>
@@ -147,14 +148,14 @@ export default function RegisterPage() {
           disabled={isLoading}
           className="w-full py-2 bg-primary text-primary-foreground rounded-md hover:opacity-90 disabled:opacity-50 text-sm font-medium"
         >
-          {isLoading ? 'Creating account...' : 'Create Account'}
+          {isLoading ? t('creatingAccount') : t('register')}
         </button>
       </form>
 
       <p className="text-center text-sm text-muted-foreground">
-        Already have an account?{' '}
+        {t('haveAccount')}{' '}
         <Link href="/login" className="text-primary hover:underline">
-          Sign in
+          {t('signInLink')}
         </Link>
       </p>
     </div>
diff --git a/it0-web-admin/src/app/providers.tsx b/it0-web-admin/src/app/providers.tsx
index aa6c2d3..6696d5f 100644
--- a/it0-web-admin/src/app/providers.tsx
+++ b/it0-web-admin/src/app/providers.tsx
@@ -4,6 +4,11 @@ import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
 import { Provider as ReduxProvider } from 'react-redux';
 import { useState } from 'react';
 import { createStore } from '@/stores/redux/store';
+import '@/i18n/config';
+import { syncLocaleOnLoad } from '@/stores/zustand/locale-store';
+
+// Sync persisted locale with i18next on app load
+syncLocaleOnLoad();
 
 export function Providers({ children }: { children: React.ReactNode }) {
   const [queryClient] = useState(() => new QueryClient({
diff --git a/it0-web-admin/src/i18n/config.ts b/it0-web-admin/src/i18n/config.ts
new file mode 100644
index 0000000..73ea8ab
--- /dev/null
+++ b/it0-web-admin/src/i18n/config.ts
@@ -0,0 +1,107 @@
+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
+import LanguageDetector from 'i18next-browser-languagedetector';
+
+// English
+import enCommon from './locales/en/common.json';
+import enSidebar from './locales/en/sidebar.json';
+import enTopbar from './locales/en/topbar.json';
+import enAuth from './locales/en/auth.json';
+import enSettings from './locales/en/settings.json';
+import enDashboard from './locales/en/dashboard.json';
+import enServers from './locales/en/servers.json';
+import enAgentConfig from './locales/en/agent-config.json';
+import enSecurity from './locales/en/security.json';
+import enMonitoring from './locales/en/monitoring.json';
+import enAudit from './locales/en/audit.json';
+import enCommunication from './locales/en/communication.json';
+import enTenants from './locales/en/tenants.json';
+import enUsers from './locales/en/users.json';
+import enTerminal from './locales/en/terminal.json';
+import enStandingOrders from './locales/en/standing-orders.json';
+import enRunbooks from './locales/en/runbooks.json';
+import enSessions from './locales/en/sessions.json';
+
+// Chinese
+import zhCommon from './locales/zh/common.json';
+import zhSidebar from './locales/zh/sidebar.json';
+import zhTopbar from './locales/zh/topbar.json';
+import zhAuth from './locales/zh/auth.json';
+import zhSettings from './locales/zh/settings.json';
+import zhDashboard from './locales/zh/dashboard.json';
+import zhServers from './locales/zh/servers.json';
+import zhAgentConfig from './locales/zh/agent-config.json';
+import zhSecurity from './locales/zh/security.json';
+import zhMonitoring from './locales/zh/monitoring.json';
+import zhAudit from './locales/zh/audit.json';
+import zhCommunication from './locales/zh/communication.json';
+import zhTenants from './locales/zh/tenants.json';
+import zhUsers from './locales/zh/users.json';
+import zhTerminal from './locales/zh/terminal.json';
+import zhStandingOrders from './locales/zh/standing-orders.json';
+import zhRunbooks from './locales/zh/runbooks.json';
+import zhSessions from './locales/zh/sessions.json';
+
+export const supportedLngs = ['en', 'zh'] as const;
+export type SupportedLocale = (typeof supportedLngs)[number];
+
+i18n
+  .use(LanguageDetector)
+  .use(initReactI18next)
+  .init({
+    resources: {
+      en: {
+        common: enCommon,
+        sidebar: enSidebar,
+        topbar: enTopbar,
+        auth: enAuth,
+        settings: enSettings,
+        dashboard: enDashboard,
+        servers: enServers,
+        'agent-config': enAgentConfig,
+        security: enSecurity,
+        monitoring: enMonitoring,
+        audit: enAudit,
+        communication: enCommunication,
+        tenants: enTenants,
+        users: enUsers,
+        terminal: enTerminal,
+        'standing-orders': enStandingOrders,
+        runbooks: enRunbooks,
+        sessions: enSessions,
+      },
+      zh: {
+        common: zhCommon,
+        sidebar: zhSidebar,
+        topbar: zhTopbar,
+        auth: zhAuth,
+        settings: zhSettings,
+        dashboard: zhDashboard,
+        servers: zhServers,
+        'agent-config': zhAgentConfig,
+        security: zhSecurity,
+        monitoring: zhMonitoring,
+        audit: zhAudit,
+        communication: zhCommunication,
+        tenants: zhTenants,
+        users: zhUsers,
+        terminal: zhTerminal,
+        'standing-orders': zhStandingOrders,
+        runbooks: zhRunbooks,
+        sessions: zhSessions,
+      },
+    },
+    fallbackLng: 'en',
+    defaultNS: 'common',
+    supportedLngs: [...supportedLngs],
+    interpolation: {
+      escapeValue: false,
+    },
+    detection: {
+      order: ['localStorage', 'navigator'],
+      lookupLocalStorage: 'it0-locale',
+      caches: [],
+    },
+  });
+
+export default i18n;
diff --git a/it0-web-admin/src/i18n/locales/en/agent-config.json b/it0-web-admin/src/i18n/locales/en/agent-config.json
new file mode 100644
index 0000000..5ac85d4
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/agent-config.json
@@ -0,0 +1,175 @@
+{
+  "title": "Agent Configuration",
+  "subtitle": "Manage AI engine settings, system prompts, and allowed tools.",
+  "loading": "Loading agent configuration...",
+  "loadError": "Failed to load configuration. Using defaults.",
+  "saveSuccess": "Configuration saved successfully.",
+  "saveConfig": "Save Configuration",
+  "resetDefaults": "Reset to Defaults",
+  "engine": {
+    "title": "Engine",
+    "claudeCli": "Claude CLI",
+    "claudeCliDesc": "Local Claude Code CLI process",
+    "claudeApi": "Claude API",
+    "claudeApiDesc": "Direct Anthropic API integration"
+  },
+  "systemPrompt": {
+    "title": "System Prompt",
+    "placeholder": "Enter the system prompt for the AI agent..."
+  },
+  "maxTurns": {
+    "title": "Max Turns",
+    "description": "Maximum number of conversation turns per session."
+  },
+  "maxBudget": {
+    "title": "Max Budget (USD)",
+    "description": "Maximum token cost per session."
+  },
+  "allowedTools": {
+    "title": "Allowed Tools",
+    "selectAll": "Select All",
+    "deselectAll": "Deselect All",
+    "tools": {
+      "Bash": "Execute shell commands",
+      "Read": "Read file contents",
+      "Write": "Write / create files",
+      "Edit": "Edit existing files",
+      "Glob": "Search files by pattern",
+      "Grep": "Search file contents",
+      "WebFetch": "Fetch web content",
+      "WebSearch": "Search the web",
+      "NotebookEdit": "Edit Jupyter notebooks",
+      "Task": "Launch sub-agent tasks"
+    }
+  },
+  "sdk": {
+    "title": "Agent SDK Configuration",
+    "subtitle": "Configure Claude Agent SDK billing, approval flow, and tool permissions per tenant.",
+    "loading": "Loading SDK configuration...",
+    "loadError": "Failed to load configuration. Using defaults.",
+    "billingMode": {
+      "title": "Billing Mode",
+      "subtitle": "Choose how Claude Agent SDK usage is billed for this tenant.",
+      "subscription": "Subscription",
+      "subscriptionDesc": "Use operator's Claude login (no API key needed)",
+      "apiKey": "API Key",
+      "apiKeyDesc": "Tenant's own Anthropic API key (token-based billing)"
+    },
+    "apiKey": {
+      "label": "Anthropic API Key",
+      "configured": "Key configured",
+      "replacePlaceholder": "Enter new key to replace existing",
+      "placeholder": "sk-ant-...",
+      "remove": "Remove",
+      "encryptionNote": "API key is encrypted (AES-256-GCM) before storage. Never stored in plaintext."
+    },
+    "approvalTimeout": {
+      "title": "L2 Approval Timeout",
+      "subtitle": "For high-risk commands (L2), how long to wait for manual approval before auto-approving. Set to 0 to disable auto-approve (wait indefinitely).",
+      "unit": "sec",
+      "autoApproveDisabled": "Auto-approve disabled — commands will wait for manual approval indefinitely.",
+      "autoApproveAfter": "Commands auto-approved after {{seconds}} seconds without response."
+    },
+    "toolPermissions": {
+      "title": "Tool Permissions",
+      "subtitle": "Override tool access per tenant. Empty whitelist means use RBAC defaults. Blacklisted tools are always denied regardless of role.",
+      "tool": "Tool",
+      "description": "Description",
+      "whitelist": "Whitelist",
+      "blacklist": "Blacklist",
+      "whitelistCount": "Whitelist: {{count}}",
+      "whitelistNone": "Whitelist: none (use RBAC defaults)",
+      "blacklistCount": "Blacklist: {{count}}",
+      "blacklistNone": "Blacklist: none"
+    },
+    "rbac": {
+      "title": "RBAC Tool Access (Reference)",
+      "subtitle": "Default tool access per role (applied when whitelist is empty).",
+      "admin": "Admin",
+      "adminTools": "All tools (Bash, Read, Write, Edit, Glob, Grep, WebFetch, WebSearch, NotebookEdit, Task)",
+      "operator": "Operator",
+      "operatorTools": "Bash, Read, Write, Edit, Glob, Grep",
+      "viewer": "Viewer",
+      "viewerTools": "Read, Glob, Grep (read-only)"
+    }
+  },
+  "skills": {
+    "title": "Skills",
+    "subtitle": "Manage Claude Code skills for the AI agent",
+    "addSkill": "Add Skill",
+    "editSkill": "Edit Skill",
+    "deleteSkill": "Delete Skill",
+    "loading": "Loading skills...",
+    "loadError": "Failed to load skills:",
+    "empty": "No skills configured yet.",
+    "categories": {
+      "inspection": "Inspection",
+      "deployment": "Deployment",
+      "maintenance": "Maintenance",
+      "security": "Security",
+      "monitoring": "Monitoring",
+      "custom": "Custom"
+    },
+    "form": {
+      "name": "Name",
+      "description": "Description",
+      "category": "Category",
+      "script": "Script",
+      "tags": "Tags",
+      "enabled": "Enabled"
+    },
+    "detail": {
+      "backToSkills": "Back to Skills",
+      "overview": "Overview",
+      "promptTemplate": "Prompt Template",
+      "allowedTools": "Allowed Tools",
+      "configuration": "Configuration",
+      "quickActions": "Quick Actions",
+      "metadata": "Metadata",
+      "duplicateSkill": "Duplicate Skill",
+      "deleteSkill": "Delete Skill",
+      "builtIn": "Built-in",
+      "custom": "Custom",
+      "enabled": "Enabled",
+      "disabled": "Disabled",
+      "noPrompt": "No prompt template defined.",
+      "noTools": "No tools configured.",
+      "notFound": "Skill not found.",
+      "loading": "Loading skill..."
+    }
+  },
+  "hooks": {
+    "title": "Hook Scripts",
+    "subtitle": "Lifecycle scripts for agent tool execution",
+    "addHook": "Add Hook",
+    "editHook": "Edit Hook",
+    "deleteHook": "Delete Hook",
+    "loading": "Loading hooks...",
+    "loadError": "Failed to load hooks:",
+    "empty": "No hooks configured.",
+    "infoBanner": "Hook scripts run before or after agent tool calls. Use them for logging, validation, or custom side-effects.",
+    "table": {
+      "name": "Name",
+      "event": "Event",
+      "toolPattern": "Tool Pattern",
+      "script": "Script",
+      "enabled": "Enabled",
+      "actions": "Actions"
+    },
+    "form": {
+      "name": "Name",
+      "eventType": "Event Type",
+      "toolPattern": "Tool Pattern",
+      "script": "Script",
+      "timeout": "Timeout",
+      "enabled": "Enabled",
+      "description": "Description"
+    },
+    "events": {
+      "beforeTool": "Before Tool",
+      "afterTool": "After Tool",
+      "onError": "On Error",
+      "onApproval": "On Approval"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/audit.json b/it0-web-admin/src/i18n/locales/en/audit.json
new file mode 100644
index 0000000..3ec25c5
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/audit.json
@@ -0,0 +1,98 @@
+{
+  "logs": {
+    "title": "Audit Logs",
+    "subtitle": "View immutable audit trail of all operations and configuration changes.",
+    "exportCsv": "Export CSV",
+    "loading": "Loading audit logs...",
+    "loadError": "Failed to load audit logs:",
+    "empty": "No audit logs found for the current filters.",
+    "filters": {
+      "dateFrom": "Date From",
+      "dateTo": "Date To",
+      "actionType": "Action Type",
+      "actorType": "Actor Type",
+      "resourceType": "Resource Type"
+    },
+    "table": {
+      "timestamp": "Timestamp",
+      "action": "Action",
+      "actorType": "Actor Type",
+      "actorId": "Actor ID",
+      "resourceType": "Resource Type",
+      "resourceId": "Resource ID",
+      "description": "Description"
+    },
+    "pagination": {
+      "rowsPerPage": "Rows per page",
+      "previous": "Previous",
+      "next": "Next",
+      "pageOf": "Page {{current}} of {{total}}"
+    },
+    "fullDetail": "Full Detail"
+  },
+  "replay": {
+    "title": "Session Replay",
+    "subtitle": "Review agent session execution history",
+    "loading": "Loading sessions...",
+    "loadError": "Failed to load sessions:",
+    "empty": "No sessions found for the current filters.",
+    "showing": "Showing {{count}} of {{total}} sessions",
+    "filters": {
+      "dateFrom": "Date From",
+      "dateTo": "Date To",
+      "status": "Status",
+      "search": "Search",
+      "searchPlaceholder": "Session ID or task description..."
+    },
+    "statuses": {
+      "all": "All",
+      "completed": "Completed",
+      "failed": "Failed",
+      "cancelled": "Cancelled",
+      "running": "Running"
+    },
+    "table": {
+      "sessionId": "Session ID",
+      "taskDescription": "Task Description",
+      "status": "Status",
+      "duration": "Duration",
+      "commands": "Commands",
+      "startedAt": "Started At"
+    },
+    "panel": {
+      "title": "Session Replay",
+      "close": "Close",
+      "id": "ID:",
+      "duration": "Duration:",
+      "commands": "Commands:",
+      "servers": "Servers:"
+    },
+    "playback": {
+      "play": "Play",
+      "pause": "Pause",
+      "reset": "Reset",
+      "showAll": "Show All",
+      "speed": "Speed:",
+      "events": "events",
+      "eventsProgress": "{{current}} / {{total}} events"
+    },
+    "events": {
+      "loading": "Loading session events...",
+      "loadError": "Error loading events:",
+      "empty": "No events recorded for this session.",
+      "pressPlay": "Press Play to begin the session replay.",
+      "collapse": "Collapse",
+      "expandFullOutput": "Expand full output",
+      "types": {
+        "commandExecuted": "Command Executed",
+        "outputReceived": "Output Received",
+        "approvalRequested": "Approval Requested",
+        "approvalGranted": "Approval Granted",
+        "approvalDenied": "Approval Denied",
+        "error": "Error",
+        "sessionStarted": "Session Started",
+        "sessionCompleted": "Session Completed"
+      }
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/auth.json b/it0-web-admin/src/i18n/locales/en/auth.json
new file mode 100644
index 0000000..95c1c5c
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/auth.json
@@ -0,0 +1,35 @@
+{
+  "appTitle": "IT0",
+  "adminConsole": "Admin Console",
+  "signIn": "Sign In",
+  "signingIn": "Signing in...",
+  "email": "Email",
+  "password": "Password",
+  "emailPlaceholder": "admin@example.com",
+  "noAccount": "Don't have an account?",
+  "createOne": "Create one",
+  "haveAccount": "Already have an account?",
+  "signInLink": "Sign in",
+  "createAccount": "Create your account",
+  "createAccountSubtitle": "Set up a new organization to get started.",
+  "fullName": "Full Name",
+  "fullNamePlaceholder": "John Doe",
+  "organizationName": "Organization Name",
+  "organizationNamePlaceholder": "Acme Corp",
+  "organizationHint": "A new tenant will be created for your organization.",
+  "confirmPassword": "Confirm Password",
+  "creatingAccount": "Creating account...",
+  "register": "Create Account",
+  "loginFailed": "Login failed",
+  "inviteTitle": "Accept Invitation",
+  "inviteSubtitle": "You've been invited to join",
+  "inviteRole": "Role:",
+  "inviteEmail": "Email:",
+  "yourName": "Your Name",
+  "choosePassword": "Choose a Password",
+  "joining": "Joining...",
+  "joinOrganization": "Join Organization",
+  "inviteInvalid": "This invitation is invalid or has expired.",
+  "backToLogin": "Back to Login",
+  "validatingInvite": "Validating invitation..."
+}
diff --git a/it0-web-admin/src/i18n/locales/en/common.json b/it0-web-admin/src/i18n/locales/en/common.json
new file mode 100644
index 0000000..6b83051
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/common.json
@@ -0,0 +1,89 @@
+{
+  "save": "Save Changes",
+  "saving": "Saving...",
+  "cancel": "Cancel",
+  "delete": "Delete",
+  "deleting": "Deleting...",
+  "edit": "Edit",
+  "create": "Create",
+  "creating": "Creating...",
+  "add": "Add",
+  "remove": "Remove",
+  "close": "Close",
+  "confirm": "Confirm",
+  "back": "Back",
+  "next": "Next",
+  "loading": "Loading...",
+  "search": "Search...",
+  "noResults": "No results found.",
+  "actions": "Actions",
+  "name": "Name",
+  "type": "Type",
+  "status": "Status",
+  "description": "Description",
+  "created": "Created",
+  "updated": "Updated",
+  "createdAt": "Created At",
+  "updatedAt": "Updated At",
+  "required": "Required",
+  "optional": "Optional",
+  "enabled": "Enabled",
+  "disabled": "Disabled",
+  "active": "Active",
+  "inactive": "Inactive",
+  "pending": "Pending",
+  "running": "Running",
+  "completed": "Completed",
+  "failed": "Failed",
+  "error": "Error",
+  "success": "Success",
+  "warning": "Warning",
+  "info": "Info",
+  "yes": "Yes",
+  "no": "No",
+  "none": "None",
+  "all": "All",
+  "id": "ID",
+  "email": "Email",
+  "role": "Role",
+  "roles": "Roles",
+  "environment": "Environment",
+  "tags": "Tags",
+  "priority": "Priority",
+  "severity": "Severity",
+  "details": "Details",
+  "configuration": "Configuration",
+  "view": "View",
+  "refresh": "Refresh",
+  "export": "Export",
+  "import": "Import",
+  "copy": "Copy",
+  "copied": "Copied!",
+  "never": "Never",
+  "unknown": "Unknown",
+  "notSelected": "Not selected",
+  "comingSoon": "Coming soon",
+  "noData": "No data available.",
+  "confirmDelete": "Are you sure you want to delete this?",
+  "operationSuccess": "Operation completed successfully.",
+  "operationFailed": "Operation failed.",
+  "passwordsNoMatch": "Passwords do not match.",
+  "riskLevel": {
+    "l0": "Read Only",
+    "l1": "Low Risk",
+    "l2": "High Risk",
+    "l3": "Forbidden"
+  },
+  "approvalStatus": {
+    "pending": "Pending",
+    "approved": "Approved",
+    "rejected": "Rejected",
+    "expired": "Expired"
+  },
+  "serverStatus": {
+    "active": "Active",
+    "inactive": "Inactive",
+    "maintenance": "Maintenance",
+    "unreachable": "Unreachable"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/communication.json b/it0-web-admin/src/i18n/locales/en/communication.json
new file mode 100644
index 0000000..24c60f0
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/communication.json
@@ -0,0 +1,112 @@
+{
+  "title": "Communication Settings",
+  "tabs": {
+    "channels": "Channels",
+    "contacts": "Contacts",
+    "escalationPolicies": "Escalation Policies"
+  },
+  "channels": {
+    "title": "Notification Channels",
+    "subtitle": "Configure how notifications are delivered.",
+    "types": {
+      "push": "Push Notification",
+      "sms": "SMS",
+      "voice": "Voice Call",
+      "email": "Email",
+      "telegram": "Telegram",
+      "wechatWork": "WeChat Work",
+      "voiceService": "Voice Service"
+    },
+    "configured": "Configured",
+    "notConfigured": "Not Configured",
+    "showConfig": "Show Config",
+    "hideConfig": "Hide Config",
+    "saveConfiguration": "Save Configuration",
+    "saving": "Saving...",
+    "saveSuccess": "Channel configuration saved.",
+    "fields": {
+      "apiKey": "API Key",
+      "apiSecret": "API Secret",
+      "fromNumber": "From Number",
+      "webhookUrl": "Webhook URL",
+      "botToken": "Bot Token",
+      "chatId": "Chat ID",
+      "corpId": "Corp ID",
+      "agentId": "Agent ID",
+      "secret": "Secret",
+      "smtpHost": "SMTP Host",
+      "smtpPort": "SMTP Port",
+      "username": "Username",
+      "password": "Password",
+      "fromAddress": "From Address",
+      "endpoint": "Endpoint",
+      "enabled": "Enabled",
+      "provider": "Provider",
+      "appId": "App ID"
+    }
+  },
+  "contacts": {
+    "title": "Contacts",
+    "subtitle": "Manage notification recipients.",
+    "count": "{{count}} contact(s)",
+    "addContact": "Add Contact",
+    "editContact": "Edit Contact",
+    "deleteContact": "Delete Contact",
+    "empty": "No contacts configured.",
+    "form": {
+      "name": "Name",
+      "email": "Email",
+      "phone": "Phone",
+      "role": "Role",
+      "channels": "Preferred Channels"
+    },
+    "table": {
+      "name": "Name",
+      "email": "Email",
+      "phone": "Phone",
+      "role": "Role",
+      "channels": "Channels",
+      "actions": "Actions"
+    }
+  },
+  "escalationPolicies": {
+    "title": "Escalation Policies",
+    "subtitle": "Define how alerts escalate when not acknowledged.",
+    "count": "{{count}} policy(ies)",
+    "addPolicy": "Add Policy",
+    "editPolicy": "Edit Policy",
+    "deletePolicy": "Delete Policy",
+    "default": "Default",
+    "empty": "No escalation policies configured.",
+    "editSteps": "Edit Steps",
+    "collapseSteps": "Collapse",
+    "form": {
+      "name": "Name",
+      "description": "Description",
+      "severity": "Severity Trigger",
+      "steps": "Escalation Steps",
+      "setAsDefault": "Set as default policy"
+    },
+    "step": {
+      "title": "Step {{number}}",
+      "delay": "Delay",
+      "delayMinutes": "minutes",
+      "channels": "Channels",
+      "contacts": "Contacts",
+      "addStep": "Add Step",
+      "removeStep": "Remove Step"
+    },
+    "severityOptions": {
+      "info": "Info",
+      "warning": "Warning",
+      "critical": "Critical",
+      "fatal": "Fatal"
+    },
+    "table": {
+      "name": "Name",
+      "severity": "Severity",
+      "steps": "Steps",
+      "actions": "Actions"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/dashboard.json b/it0-web-admin/src/i18n/locales/en/dashboard.json
new file mode 100644
index 0000000..2db615b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/dashboard.json
@@ -0,0 +1,27 @@
+{
+  "title": "Dashboard",
+  "subtitle": "System overview and recent activity",
+  "stats": {
+    "totalServers": "Total Servers",
+    "activeAlerts": "Active Alerts",
+    "runningTasks": "Running Tasks",
+    "standingOrders": "Standing Orders"
+  },
+  "recentAlerts": {
+    "title": "Recent Alerts",
+    "severity": "Severity",
+    "message": "Message",
+    "server": "Server",
+    "time": "Time",
+    "empty": "No recent alerts.",
+    "viewAll": "View all alerts"
+  },
+  "recentTasks": {
+    "title": "Recent Tasks",
+    "name": "Name",
+    "status": "Status",
+    "created": "Created",
+    "empty": "No recent tasks.",
+    "viewAll": "View all tasks"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/monitoring.json b/it0-web-admin/src/i18n/locales/en/monitoring.json
new file mode 100644
index 0000000..82786e6
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/monitoring.json
@@ -0,0 +1,173 @@
+{
+  "alertRules": {
+    "title": "Alert Rules",
+    "subtitle": "Configure alert rules to monitor server metrics and receive notifications.",
+    "addRule": "Add Rule",
+    "editRule": "Edit Rule",
+    "deleteRule": "Delete Alert Rule",
+    "loading": "Loading alert rules...",
+    "loadError": "Failed to load alert rules:",
+    "empty": "No alert rules found.",
+    "table": {
+      "name": "Name",
+      "metric": "Metric",
+      "condition": "Condition",
+      "threshold": "Threshold",
+      "severity": "Severity",
+      "enabled": "Enabled",
+      "actions": "Actions"
+    },
+    "form": {
+      "name": "Name",
+      "description": "Description",
+      "metric": "Metric",
+      "condition": "Condition",
+      "threshold": "Threshold",
+      "severity": "Severity",
+      "notifyChannels": "Notify Channels",
+      "notifyChannelsPlaceholder": "email, slack, webhook (comma-separated)",
+      "cooldownMinutes": "Cooldown (minutes)",
+      "enabled": "Enabled"
+    },
+    "validation": {
+      "nameRequired": "Name is required",
+      "metricRequired": "Metric is required",
+      "thresholdRequired": "Valid threshold is required",
+      "cooldownRequired": "Valid cooldown is required"
+    },
+    "metrics": {
+      "cpuUsage": "CPU Usage",
+      "memoryUsage": "Memory Usage",
+      "diskUsage": "Disk Usage",
+      "networkLatency": "Network Latency",
+      "httpErrorRate": "HTTP Error Rate",
+      "custom": "Custom"
+    },
+    "conditions": {
+      "greaterThan": "> (greater than)",
+      "lessThan": "< (less than)",
+      "equal": "== (equal)",
+      "greaterOrEqual": ">= (greater or equal)",
+      "lessOrEqual": "<= (less or equal)"
+    },
+    "severities": {
+      "info": "Info",
+      "warning": "Warning",
+      "critical": "Critical",
+      "fatal": "Fatal"
+    },
+    "deleteConfirm": "Are you sure you want to delete this rule? This will stop all future alerts and cannot be undone.",
+    "detail": {
+      "backToAlertRules": "Back to Alert Rules",
+      "ruleConfiguration": "Rule Configuration",
+      "recentAlertEvents": "Recent Alert Events",
+      "ruleSummary": "Rule Summary",
+      "notifyChannels": "Notify Channels",
+      "quickActions": "Quick Actions",
+      "metadata": "Metadata",
+      "ruleExpression": "Rule Expression",
+      "loading": "Loading alert rule...",
+      "loadError": "Failed to load alert rule:",
+      "noDescription": "No description",
+      "noneConfigured": "None configured",
+      "noNotificationChannels": "No notification channels configured.",
+      "noAlertEvents": "No alert events triggered by this rule yet.",
+      "disableRule": "Disable Rule",
+      "enableRule": "Enable Rule",
+      "editRule": "Edit Rule",
+      "deleteRule": "Delete Rule",
+      "updating": "Updating...",
+      "failedToUpdate": "Failed to update rule:",
+      "ruleId": "Rule ID",
+      "cooldown": "Cooldown",
+      "totalEvents": "Total Events",
+      "eventTable": {
+        "severity": "Severity",
+        "metric": "Metric",
+        "value": "Value",
+        "threshold": "Threshold",
+        "message": "Message",
+        "status": "Status",
+        "triggered": "Triggered"
+      },
+      "eventStatus": {
+        "resolved": "Resolved",
+        "active": "Active"
+      }
+    }
+  },
+  "healthChecks": {
+    "title": "Health Checks",
+    "subtitle": "Monitor server health and availability",
+    "loading": "Loading health checks...",
+    "loadError": "Failed to load health checks:",
+    "empty": "No health checks found.",
+    "noMatchingStatus": "No servers with status \"{{status}}\" found.",
+    "autoRefresh": "Auto-refresh:",
+    "live": "Live",
+    "refreshOptions": {
+      "off": "Off",
+      "10s": "10s",
+      "30s": "30s",
+      "60s": "60s"
+    },
+    "stats": {
+      "totalServers": "Total Servers",
+      "healthy": "Healthy",
+      "degraded": "Degraded",
+      "down": "Down"
+    },
+    "filters": {
+      "all": "All",
+      "healthy": "Healthy",
+      "degraded": "Degraded",
+      "down": "Down"
+    },
+    "card": {
+      "latency": "Latency",
+      "uptime24h": "Uptime (24h)",
+      "lastCheck": "Last Check"
+    },
+    "checkTypes": {
+      "ping": "ping",
+      "tcp": "tcp",
+      "http": "http"
+    }
+  },
+  "metrics": {
+    "title": "Metrics Dashboard",
+    "subtitle": "Monitor server performance and resource utilization",
+    "loading": "Loading server metrics...",
+    "loadError": "Failed to load server metrics:",
+    "empty": "No server metrics available.",
+    "noMatchingFilters": "No servers match the current filters.",
+    "autoRefresh": "Auto-refresh (30s)",
+    "live": "Live",
+    "searchPlaceholder": "Search by hostname...",
+    "showing": "Showing {{count}} of {{total}} servers",
+    "overview": {
+      "totalServers": "Total Servers",
+      "online": "Online",
+      "avgCpu": "Avg CPU",
+      "avgMemory": "Avg Memory",
+      "alertsToday": "Alerts Today"
+    },
+    "filters": {
+      "all": "All",
+      "dev": "Dev",
+      "staging": "Staging",
+      "prod": "Prod",
+      "online": "Online",
+      "offline": "Offline"
+    },
+    "table": {
+      "hostname": "Hostname",
+      "env": "Env",
+      "status": "Status",
+      "cpuPercent": "CPU %",
+      "memoryPercent": "Memory %",
+      "diskPercent": "Disk %",
+      "lastChecked": "Last Checked"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/runbooks.json b/it0-web-admin/src/i18n/locales/en/runbooks.json
new file mode 100644
index 0000000..14d73f8
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/runbooks.json
@@ -0,0 +1,75 @@
+{
+  "title": "Runbooks",
+  "subtitle": "Manage operations runbooks and automation scripts.",
+  "newRunbook": "New Runbook",
+  "loading": "Loading runbooks...",
+  "loadError": "Failed to load runbooks:",
+  "empty": "No runbooks yet.",
+  "triggerTypes": {
+    "manual": "Manual",
+    "alert": "Alert",
+    "scheduled": "Scheduled"
+  },
+  "riskLevels": {
+    "0": "L0 - Info",
+    "1": "L1 - Low",
+    "2": "L2 - Medium",
+    "3": "L3 - High"
+  },
+  "form": {
+    "name": "Name",
+    "description": "Description",
+    "triggerType": "Trigger Type",
+    "promptTemplate": "Prompt Template",
+    "allowedTools": "Allowed Tools",
+    "maxRiskLevel": "Max Risk Level",
+    "autoApprove": "Auto-Approve",
+    "enabled": "Enabled"
+  },
+  "table": {
+    "name": "Name",
+    "description": "Description",
+    "trigger": "Trigger",
+    "maxRisk": "Max Risk",
+    "autoApprove": "Auto-Approve",
+    "actions": "Actions"
+  },
+  "deleteDialog": {
+    "title": "Delete Runbook",
+    "message": "Are you sure you want to delete this runbook? This action cannot be undone. All execution history will also be removed."
+  },
+  "detail": {
+    "backToRunbooks": "Back to Runbooks",
+    "back": "Back",
+    "overview": "Overview",
+    "promptTemplate": "Prompt Template",
+    "allowedTools": "Allowed Tools",
+    "executionHistory": "Execution History",
+    "configuration": "Configuration",
+    "quickActions": "Quick Actions",
+    "loading": "Loading runbook...",
+    "loadError": "Failed to load runbook:",
+    "notFound": "Runbook not found.",
+    "noDescription": "No description provided.",
+    "noPrompt": "No prompt template defined.",
+    "noTools": "No tools configured.",
+    "noExecutions": "No executions yet.",
+    "enableToExecute": "Enable the runbook to execute it.",
+    "triggerType": "Trigger Type",
+    "maxRiskLevel": "Max Risk Level",
+    "autoApprove": "Auto-Approve",
+    "autoApproveDescription": "Auto-approve actions within the configured risk level.",
+    "statusLabel": "Status",
+    "executeNow": "Execute Now",
+    "executing": "Executing...",
+    "duplicate": "Duplicate",
+    "duplicating": "Duplicating...",
+    "deleteRunbook": "Delete Runbook",
+    "executionTable": {
+      "date": "Date",
+      "status": "Status",
+      "duration": "Duration",
+      "triggeredBy": "Triggered By"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/security.json b/it0-web-admin/src/i18n/locales/en/security.json
new file mode 100644
index 0000000..78231b6
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/security.json
@@ -0,0 +1,151 @@
+{
+  "title": "Security & Risk Rules",
+  "subtitle": "Configure command risk classification rules and security policies.",
+  "riskRules": {
+    "title": "Command Risk Rules",
+    "addRule": "Add Rule",
+    "editRule": "Edit Rule",
+    "deleteRule": "Delete Rule",
+    "loading": "Loading risk rules...",
+    "loadError": "Failed to load risk rules:",
+    "empty": "No risk rules configured.",
+    "table": {
+      "pattern": "Pattern",
+      "riskLevel": "Risk Level",
+      "action": "Action",
+      "description": "Description",
+      "actions": "Actions"
+    },
+    "form": {
+      "pattern": "Pattern",
+      "patternPlaceholder": "rm -rf *, sudo *, etc.",
+      "riskLevel": "Risk Level",
+      "action": "Action",
+      "description": "Description"
+    },
+    "riskLevels": {
+      "0": "0 - None",
+      "1": "1 - Low",
+      "2": "2 - Medium",
+      "3": "3 - High"
+    },
+    "actions": {
+      "allow": "Allow",
+      "block": "Block",
+      "requireApproval": "Require Approval"
+    }
+  },
+  "permissionMatrix": {
+    "title": "Permission Matrix",
+    "roles": {
+      "admin": "Admin",
+      "operator": "Operator",
+      "viewer": "Viewer",
+      "readonly": "Read-only"
+    },
+    "permissions": {
+      "manageServers": "Manage Servers",
+      "executeCommands": "Execute Commands",
+      "viewAudit": "View Audit",
+      "manageUsers": "Manage Users",
+      "approveCommands": "Approve Commands"
+    },
+    "savePermissions": "Save Permissions"
+  },
+  "credentials": {
+    "title": "Credentials",
+    "subtitle": "Manage SSH credentials for server connections",
+    "addCredential": "Add Credential",
+    "editCredential": "Edit Credential",
+    "deleteCredential": "Delete Credential",
+    "testCredential": "Test",
+    "loading": "Loading credentials...",
+    "loadError": "Failed to load credentials:",
+    "empty": "No credentials found.",
+    "securityNotice": "Credentials are stored encrypted and are only decrypted during use.",
+    "authTypes": {
+      "password": "Password",
+      "sshKey": "SSH Key",
+      "sshKeyPassphrase": "SSH Key + Passphrase"
+    },
+    "table": {
+      "name": "Name",
+      "type": "Type",
+      "username": "Username",
+      "associatedServers": "Associated Servers",
+      "created": "Created",
+      "actions": "Actions"
+    },
+    "form": {
+      "name": "Name",
+      "authType": "Authentication Type",
+      "username": "Username",
+      "password": "Password",
+      "privateKey": "Private Key",
+      "passphrase": "Passphrase",
+      "servers": "Associated Servers"
+    },
+    "encryptionWarning": "Encrypted data cannot be retrieved after saving."
+  },
+  "roles": {
+    "title": "Roles",
+    "subtitle": "Manage roles and their associated permissions",
+    "addRole": "Add Role",
+    "editRole": "Edit Role",
+    "deleteRole": "Delete Role",
+    "loading": "Loading roles...",
+    "loadError": "Failed to load roles:",
+    "empty": "No roles found.",
+    "builtIn": "Built-in",
+    "custom": "Custom",
+    "showPerms": "Permissions",
+    "hidePerms": "Hide Perms",
+    "assignedPermissions": "Assigned Permissions",
+    "savingPermissions": "Saving permissions...",
+    "table": {
+      "name": "Name",
+      "description": "Description",
+      "type": "Type",
+      "permissions": "Permissions",
+      "users": "Users",
+      "created": "Created",
+      "actions": "Actions"
+    },
+    "form": {
+      "name": "Name",
+      "description": "Description"
+    }
+  },
+  "permissions": {
+    "title": "Permissions",
+    "subtitle": "View and manage the permission matrix across roles",
+    "loading": "Loading permissions matrix...",
+    "loadError": "Failed to load permissions:",
+    "empty": "No permissions found.",
+    "resource": "Resource",
+    "permission": "Permission",
+    "action": "Action",
+    "details": "Permission Details",
+    "actionTypes": {
+      "create": "create",
+      "read": "read",
+      "update": "update",
+      "delete": "delete",
+      "execute": "execute"
+    },
+    "summary": {
+      "title": "Summary",
+      "totalPermissions": "Total Permissions",
+      "totalRoles": "Total Roles",
+      "resources": "Resources",
+      "granted": "Granted"
+    },
+    "detailDialog": {
+      "title": "Permission Details",
+      "key": "Key",
+      "resource": "Resource",
+      "action": "Action",
+      "description": "Description"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/servers.json b/it0-web-admin/src/i18n/locales/en/servers.json
new file mode 100644
index 0000000..a62ddac
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/servers.json
@@ -0,0 +1,97 @@
+{
+  "title": "Servers",
+  "subtitle": "Manage server inventory, clusters, and SSH configurations.",
+  "addServer": "Add Server",
+  "editServer": "Edit Server",
+  "deleteServer": "Delete Server",
+  "loading": "Loading servers...",
+  "loadError": "Failed to load servers:",
+  "empty": "No servers found.",
+  "filters": {
+    "all": "All",
+    "dev": "Dev",
+    "staging": "Staging",
+    "prod": "Prod"
+  },
+  "table": {
+    "hostname": "Hostname",
+    "host": "Host",
+    "environment": "Environment",
+    "role": "Role",
+    "status": "Status",
+    "actions": "Actions"
+  },
+  "form": {
+    "hostname": "Hostname",
+    "hostIp": "Host (IP)",
+    "sshPort": "SSH Port",
+    "environment": "Environment",
+    "role": "Role",
+    "tags": "Tags",
+    "description": "Description",
+    "tagsPlaceholder": "tag1, tag2 (comma-separated)",
+    "descriptionPlaceholder": "Optional description..."
+  },
+  "validation": {
+    "hostnameRequired": "Hostname is required",
+    "hostRequired": "Host is required"
+  },
+  "dialog": {
+    "deleteConfirm": "Are you sure you want to delete",
+    "deleteWarning": "This action cannot be undone. The server and all its associated data will be permanently removed."
+  },
+  "detail": {
+    "backToServers": "Back to Servers",
+    "serverInformation": "Server Information",
+    "recentHealthChecks": "Recent Health Checks",
+    "recentCommands": "Recent Commands",
+    "quickActions": "Quick Actions",
+    "connectionInfo": "Connection Info",
+    "tags": "Tags",
+    "noTags": "No tags assigned.",
+    "loading": "Loading server details...",
+    "loadError": "Failed to load server:",
+    "noHealthChecks": "No health checks recorded yet.",
+    "noCommands": "No commands executed on this server yet.",
+    "saveChanges": "Save Changes",
+    "openTerminal": "Open Terminal",
+    "runHealthCheck": "Run Health Check",
+    "editServer": "Edit Server",
+    "deleteServer": "Delete Server",
+    "healthCheckTable": {
+      "status": "Status",
+      "latency": "Latency",
+      "message": "Message",
+      "time": "Time"
+    },
+    "commandsTable": {
+      "command": "Command",
+      "exitCode": "Exit Code",
+      "risk": "Risk",
+      "time": "Time"
+    }
+  },
+  "clusters": {
+    "title": "Clusters",
+    "subtitle": "Organize servers into logical groups",
+    "addCluster": "Add Cluster",
+    "editCluster": "Edit Cluster",
+    "deleteCluster": "Delete Cluster",
+    "loading": "Loading clusters...",
+    "loadError": "Failed to load clusters:",
+    "empty": "No clusters found.",
+    "form": {
+      "name": "Name",
+      "description": "Description",
+      "environment": "Environment",
+      "tags": "Tags",
+      "servers": "Servers"
+    },
+    "health": {
+      "online": "online",
+      "offline": "offline",
+      "maintenance": "maintenance",
+      "noServers": "No servers"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/sessions.json b/it0-web-admin/src/i18n/locales/en/sessions.json
new file mode 100644
index 0000000..5d26711
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/sessions.json
@@ -0,0 +1,46 @@
+{
+  "title": "Sessions",
+  "subtitle": "View and manage agent sessions",
+  "loading": "Loading sessions...",
+  "loadError": "Failed to load sessions:",
+  "empty": "No sessions found.",
+  "statuses": {
+    "running": "Running",
+    "completed": "Completed",
+    "failed": "Failed",
+    "cancelled": "Cancelled"
+  },
+  "detail": {
+    "title": "Session",
+    "backToSessions": "Back to Sessions",
+    "sessionInformation": "Session Information",
+    "eventStream": "Event Stream",
+    "statistics": "Statistics",
+    "tasks": "Tasks",
+    "serverTargets": "Server Targets",
+    "timestamps": "Timestamps",
+    "loading": "Loading session details...",
+    "loadError": "Failed to load session:",
+    "autoScroll": "Auto-scroll",
+    "liveStreaming": "Live -- streaming events...",
+    "noEvents": "No events recorded yet.",
+    "noTasks": "No tasks in this session.",
+    "info": {
+      "sessionId": "Session ID",
+      "status": "Status",
+      "engine": "Engine",
+      "startedAt": "Started At",
+      "endedAt": "Ended At",
+      "duration": "Duration",
+      "tokenCount": "Token Count",
+      "totalCost": "Total Cost",
+      "task": "Task"
+    },
+    "engines": {
+      "claudeCli": "Claude Code CLI",
+      "claudeApi": "Claude API"
+    },
+    "inProgressDuration": "In progress...",
+    "inProgressStatus": "In progress"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/settings.json b/it0-web-admin/src/i18n/locales/en/settings.json
new file mode 100644
index 0000000..a7a3a6d
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/settings.json
@@ -0,0 +1,79 @@
+{
+  "title": "Settings",
+  "subtitle": "Application preferences and configurations.",
+  "sections": {
+    "general": "General",
+    "notifications": "Notifications",
+    "apikeys": "API Keys",
+    "theme": "Theme",
+    "account": "Account"
+  },
+  "general": {
+    "title": "General Settings",
+    "platformName": "Platform Name",
+    "platformNamePlaceholder": "IT0 Platform",
+    "defaultTimezone": "Default Timezone",
+    "defaultLanguage": "Default Language",
+    "uiLanguage": "Interface Language",
+    "uiLanguageHint": "Change the display language for this browser.",
+    "autoApproveThreshold": "Auto-Approve Threshold (Risk Level 0-3)",
+    "autoApproveHint": "Operations at or below this risk level will be auto-approved.",
+    "saved": "Settings saved successfully."
+  },
+  "notifications": {
+    "title": "Notification Settings",
+    "email": "Email Notifications",
+    "sms": "SMS Notifications",
+    "push": "Push Notifications",
+    "escalationPolicy": "Default Escalation Policy",
+    "saved": "Notification settings saved."
+  },
+  "apikeys": {
+    "title": "API Keys",
+    "namePlaceholder": "Key name (e.g. CI/CD Pipeline)",
+    "generate": "Generate New Key",
+    "generatedWarning": "New API key generated. Copy it now -- it will not be shown again.",
+    "copyToClipboard": "Copy to Clipboard",
+    "dismiss": "Dismiss",
+    "headerName": "Name",
+    "headerKey": "Key",
+    "headerCreated": "Created",
+    "headerLastUsed": "Last Used",
+    "headerActions": "Actions",
+    "revoke": "Revoke",
+    "noKeys": "No API keys. Generate one above."
+  },
+  "theme": {
+    "title": "Theme",
+    "appearance": "Appearance",
+    "light": "Light",
+    "dark": "Dark",
+    "primaryColor": "Primary Color",
+    "customColor": "Custom color",
+    "selected": "Selected: {{color}}",
+    "saveTheme": "Save Theme",
+    "saved": "Theme settings saved."
+  },
+  "account": {
+    "profileTitle": "Account Profile",
+    "displayName": "Display Name",
+    "email": "Email",
+    "emailHint": "Email cannot be changed here.",
+    "saveProfile": "Save Profile",
+    "profileSaved": "Profile updated.",
+    "changePassword": "Change Password",
+    "currentPassword": "Current Password",
+    "newPassword": "New Password",
+    "confirmPassword": "Confirm New Password",
+    "passwordChanged": "Password changed successfully.",
+    "changing": "Changing..."
+  },
+  "languages": {
+    "en": "English",
+    "zh": "中文",
+    "ko": "한국어",
+    "ja": "日本語",
+    "de": "Deutsch",
+    "fr": "Français"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/sidebar.json b/it0-web-admin/src/i18n/locales/en/sidebar.json
new file mode 100644
index 0000000..d83bdd9
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/sidebar.json
@@ -0,0 +1,33 @@
+{
+  "appName": "IT0 Admin",
+  "appSubtitle": "Operations Console",
+  "dashboard": "Dashboard",
+  "agentConfig": "Agent Config",
+  "enginePrompt": "Engine & Prompt",
+  "sdkConfig": "SDK Config",
+  "skills": "Skills",
+  "hooks": "Hooks",
+  "runbooks": "Runbooks",
+  "standingOrders": "Standing Orders",
+  "servers": "Servers",
+  "allServers": "All Servers",
+  "clusters": "Clusters",
+  "monitoring": "Monitoring",
+  "alertRules": "Alert Rules",
+  "healthChecks": "Health Checks",
+  "metrics": "Metrics",
+  "terminal": "Terminal",
+  "security": "Security",
+  "riskRules": "Risk Rules",
+  "credentials": "Credentials",
+  "roles": "Roles",
+  "permissions": "Permissions",
+  "audit": "Audit",
+  "logs": "Logs",
+  "sessionReplay": "Session Replay",
+  "communication": "Communication",
+  "tenants": "Tenants",
+  "users": "Users",
+  "settings": "Settings",
+  "collapse": "Collapse"
+}
diff --git a/it0-web-admin/src/i18n/locales/en/standing-orders.json b/it0-web-admin/src/i18n/locales/en/standing-orders.json
new file mode 100644
index 0000000..98f7d55
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/standing-orders.json
@@ -0,0 +1,111 @@
+{
+  "title": "Standing Orders",
+  "subtitle": "Manage autonomous operation tasks and execution schedules.",
+  "newOrder": "New Standing Order",
+  "loading": "Loading standing orders...",
+  "loadError": "Failed to load standing orders:",
+  "empty": "No standing orders yet.",
+  "triggerTypes": {
+    "cron": "Cron Schedule",
+    "event": "Event",
+    "threshold": "Threshold"
+  },
+  "statuses": {
+    "active": "Active",
+    "paused": "Paused"
+  },
+  "form": {
+    "name": "Name",
+    "description": "Description",
+    "triggerType": "Trigger Type",
+    "triggerConfiguration": "Trigger Configuration",
+    "cronExpression": "Cron Expression",
+    "eventType": "Event Type",
+    "metric": "Metric",
+    "condition": "Condition",
+    "thresholdValue": "Threshold Value",
+    "targetServers": "Target Servers",
+    "targetServersPlaceholder": "server-1, server-2 (comma-separated)",
+    "agentInstruction": "Agent Instruction",
+    "maxBudget": "Max Budget (USD)",
+    "escalateOnFailure": "Escalate on failure"
+  },
+  "table": {
+    "name": "Name",
+    "trigger": "Trigger",
+    "status": "Status",
+    "lastExecution": "Last Execution",
+    "nextRun": "Next Run",
+    "actions": "Actions"
+  },
+  "executionHistory": {
+    "title": "Execution History",
+    "loading": "Loading executions...",
+    "loadError": "Failed to load executions:",
+    "empty": "No executions recorded yet.",
+    "table": {
+      "date": "Date",
+      "status": "Status",
+      "duration": "Duration",
+      "commands": "Commands",
+      "summary": "Summary",
+      "cost": "Cost"
+    },
+    "executionStatuses": {
+      "running": "Running",
+      "completed": "Completed",
+      "failed": "Failed"
+    },
+    "executionSummary": "Execution Summary",
+    "noSummary": "No summary available.",
+    "inProgress": "In progress...",
+    "started": "Started:",
+    "ended": "Ended:"
+  },
+  "deleteDialog": {
+    "title": "Delete Standing Order",
+    "message": "Are you sure you want to delete this standing order? This will stop all future executions and cannot be undone."
+  },
+  "detail": {
+    "backToStandingOrders": "Back to Standing Orders",
+    "overview": "Overview",
+    "triggerConfiguration": "Trigger Configuration",
+    "agentInstruction": "Agent Instruction",
+    "targetServers": "Target Servers",
+    "noTargetServers": "No target servers configured.",
+    "maxBudget": "Max Budget",
+    "statusAndControls": "Status & Controls",
+    "quickActions": "Quick Actions",
+    "statistics": "Statistics",
+    "metadata": "Metadata",
+    "loading": "Loading standing order...",
+    "loadError": "Failed to load standing order:",
+    "notFound": "Standing order not found.",
+    "pauseOrder": "Pause Order",
+    "activateOrder": "Activate Order",
+    "executeNow": "Execute Now",
+    "triggering": "Triggering...",
+    "executionTriggered": "Execution triggered successfully.",
+    "edit": "Edit",
+    "editStandingOrder": "Edit Standing Order",
+    "viewLogs": "View Logs",
+    "delete": "Delete",
+    "escalateOnFailure": "Escalate on Failure",
+    "lastExecution": "Last Execution",
+    "nextRun": "Next Run",
+    "expression": "Expression:",
+    "eventType": "Event Type:",
+    "stats": {
+      "totalExecutions": "Total Executions",
+      "successRate": "Success Rate",
+      "avgDuration": "Avg Duration",
+      "lastFailure": "Last Failure"
+    },
+    "pagination": {
+      "showing": "Showing {{from}} - {{to}} of {{total}}",
+      "previous": "Previous",
+      "next": "Next",
+      "pageOf": "Page {{current}} of {{total}}"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/tenants.json b/it0-web-admin/src/i18n/locales/en/tenants.json
new file mode 100644
index 0000000..3d8625c
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/tenants.json
@@ -0,0 +1,107 @@
+{
+  "title": "Tenant Management",
+  "subtitle": "Manage tenants, plans, and resource quotas.",
+  "newTenant": "+ New Tenant",
+  "createTenant": "Create New Tenant",
+  "loading": "Loading tenants...",
+  "loadError": "Failed to load tenants:",
+  "empty": "No tenants found. Create your first tenant to get started.",
+  "form": {
+    "name": "Name",
+    "slug": "Slug",
+    "plan": "Plan",
+    "adminEmail": "Admin Email",
+    "status": "Status"
+  },
+  "plans": {
+    "free": "Free",
+    "pro": "Pro",
+    "enterprise": "Enterprise"
+  },
+  "statuses": {
+    "active": "Active",
+    "suspended": "Suspended"
+  },
+  "table": {
+    "name": "Name",
+    "slug": "Slug",
+    "plan": "Plan",
+    "status": "Status",
+    "users": "Users",
+    "created": "Created",
+    "actions": "Actions"
+  },
+  "actions": {
+    "suspend": "Suspend",
+    "activate": "Activate",
+    "quotas": "Quotas",
+    "hideQuotas": "Hide Quotas"
+  },
+  "quotas": {
+    "title": "Resource Quotas",
+    "maxServers": "Max Servers",
+    "maxUsers": "Max Users",
+    "maxStandingOrders": "Max Standing Orders",
+    "maxAgentTokens": "Max Agent Tokens / Month"
+  },
+  "createDialog": {
+    "create": "Create Tenant",
+    "creating": "Creating..."
+  },
+  "detail": {
+    "backToTenants": "Back to Tenants",
+    "tenantInformation": "Tenant Information",
+    "members": "Members",
+    "invitations": "Invitations",
+    "quickActions": "Quick Actions",
+    "metadata": "Metadata",
+    "loading": "Loading tenant details...",
+    "loadError": "Failed to load tenant:",
+    "failedToUpdate": "Failed to update tenant:",
+    "schemaName": "Schema Name",
+    "memberCount": "Members",
+    "noMembers": "No members found.",
+    "noInvitations": "No invitations sent yet.",
+    "inviteUser": "+ Invite User",
+    "sendInvite": "Send Invite",
+    "sending": "Sending...",
+    "revoke": "Revoke",
+    "suspendTenant": "Suspend Tenant",
+    "activateTenant": "Activate Tenant",
+    "viewAuditLog": "View Audit Log",
+    "editTenant": "Edit Tenant",
+    "deleteTenant": "Delete Tenant",
+    "tenantId": "Tenant ID",
+    "slug": "Slug",
+    "schema": "Schema",
+    "membersTable": {
+      "name": "Name",
+      "email": "Email",
+      "role": "Role",
+      "joined": "Joined"
+    },
+    "invitesTable": {
+      "email": "Email",
+      "role": "Role",
+      "status": "Status",
+      "actions": "Actions"
+    },
+    "inviteForm": {
+      "email": "Email",
+      "emailPlaceholder": "user@example.com",
+      "role": "Role",
+      "roles": {
+        "viewer": "Viewer",
+        "operator": "Operator",
+        "admin": "Admin"
+      }
+    },
+    "deleteDialog": {
+      "title": "Delete Tenant",
+      "message": "Are you sure you want to delete this tenant? This will permanently remove the tenant, all its data, and all member associations. This action cannot be undone."
+    },
+    "validation": {
+      "nameRequired": "Name is required"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/en/terminal.json b/it0-web-admin/src/i18n/locales/en/terminal.json
new file mode 100644
index 0000000..92bdbb2
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/terminal.json
@@ -0,0 +1,44 @@
+{
+  "title": "Terminal",
+  "subtitle": "Remote shell access",
+  "connection": {
+    "connected": "Connected",
+    "connecting": "Connecting...",
+    "disconnected": "Disconnected"
+  },
+  "server": {
+    "label": "Server:",
+    "selectServer": "Select a server",
+    "loadingServers": "Loading servers..."
+  },
+  "actions": {
+    "connect": "Connect",
+    "disconnect": "Disconnect",
+    "clear": "Clear"
+  },
+  "noServerSelected": "No server selected",
+  "selectServerPrompt": "Select a server and click Connect to start a terminal session.",
+  "messages": {
+    "noAuthToken": "No authentication token found. Please log in first.",
+    "connecting": "Connecting to {{hostname}} ({{host}})...",
+    "connectedTo": "Connected to {{hostname}}. Type commands below.",
+    "connected": "Connected to {{server}}",
+    "disconnected": "Disconnected from server.",
+    "disconnectedFrom": "Disconnected from {{hostname}} (code {{code}}).{{reason}}",
+    "connectionFailed": "Connection failed:",
+    "unknownError": "Unknown error",
+    "wsError": "WebSocket error occurred.",
+    "notConnected": "Not connected. Please connect to a server first.",
+    "reconnecting": "Reconnecting...",
+    "sessionTimeout": "Session timed out."
+  },
+  "shortcuts": {
+    "title": "Keyboard Shortcuts",
+    "sendCommand": "Send command",
+    "commandHistory": "Command history",
+    "clearTerminal": "Clear terminal"
+  },
+  "readyMessage": "Terminal ready. Type a command and press Enter.",
+  "placeholder": "Type a command...",
+  "placeholderDisconnected": "Connect to a server to start typing"
+}
diff --git a/it0-web-admin/src/i18n/locales/en/topbar.json b/it0-web-admin/src/i18n/locales/en/topbar.json
new file mode 100644
index 0000000..0677c0b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/topbar.json
@@ -0,0 +1,10 @@
+{
+  "search": "Search...",
+  "shortcutKey": "⌘K",
+  "tenant": "Tenant:",
+  "notSelected": "Not selected",
+  "settings": "Settings",
+  "users": "Users",
+  "signOut": "Sign out",
+  "defaultUser": "User"
+}
diff --git a/it0-web-admin/src/i18n/locales/en/users.json b/it0-web-admin/src/i18n/locales/en/users.json
new file mode 100644
index 0000000..1964d4b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/en/users.json
@@ -0,0 +1,89 @@
+{
+  "title": "Users",
+  "subtitle": "Manage user accounts and access",
+  "addUser": "Add User",
+  "loading": "Loading users...",
+  "loadError": "Failed to load users:",
+  "empty": "No users found. Add one to get started.",
+  "noMatchingFilters": "No users match the current filters.",
+  "showing": "Showing {{count}} of {{total}} users",
+  "searchPlaceholder": "Search by name or email...",
+  "allRoles": "All Roles",
+  "roles": {
+    "admin": "Admin",
+    "operator": "Operator",
+    "viewer": "Viewer"
+  },
+  "statuses": {
+    "active": "Active",
+    "disabled": "Disabled"
+  },
+  "table": {
+    "name": "Name",
+    "email": "Email",
+    "role": "Role",
+    "tenant": "Tenant",
+    "status": "Status",
+    "lastLogin": "Last Login",
+    "created": "Created",
+    "actions": "Actions"
+  },
+  "form": {
+    "displayName": "Display Name",
+    "email": "Email",
+    "password": "Password",
+    "role": "Role",
+    "tenantId": "Tenant ID"
+  },
+  "createDialog": {
+    "title": "Add User",
+    "create": "Create User",
+    "creating": "Creating..."
+  },
+  "editDialog": {
+    "title": "Edit User:",
+    "save": "Save Changes",
+    "saving": "Saving..."
+  },
+  "deleteDialog": {
+    "title": "Delete User",
+    "message": "Are you sure you want to delete this user? This action cannot be undone.",
+    "warning": "The user will lose all access and their sessions will be terminated immediately."
+  },
+  "validation": {
+    "displayNameRequired": "Display name is required",
+    "emailRequired": "Email is required",
+    "passwordRequired": "Password is required"
+  },
+  "detail": {
+    "backToUsers": "Back to Users",
+    "userInformation": "User Information",
+    "activityLog": "Activity Log",
+    "quickActions": "Quick Actions",
+    "accountSummary": "Account Summary",
+    "loading": "Loading user details...",
+    "loadError": "Failed to load user:",
+    "failedToUpdate": "Failed to update user:",
+    "noActivity": "No activity recorded yet.",
+    "editUser": "Edit User",
+    "resetPassword": "Reset Password",
+    "deleteUser": "Delete User",
+    "memberSince": "Member Since",
+    "lastLogin": "Last Login",
+    "activityTable": {
+      "action": "Action",
+      "resource": "Resource",
+      "details": "Details",
+      "ipAddress": "IP Address",
+      "time": "Time"
+    },
+    "resetPasswordDialog": {
+      "title": "Reset Password",
+      "message": "This will send a password reset link to this user's email address. The user will need to set a new password.",
+      "sendResetLink": "Send Reset Link",
+      "sending": "Sending...",
+      "success": "A password reset link has been sent to the user's email address.",
+      "done": "Done"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/agent-config.json b/it0-web-admin/src/i18n/locales/zh/agent-config.json
new file mode 100644
index 0000000..cddfdb3
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/agent-config.json
@@ -0,0 +1,175 @@
+{
+  "title": "代理配置",
+  "subtitle": "管理 AI 引擎设置、系统提示词和允许的工具。",
+  "loading": "正在加载代理配置...",
+  "loadError": "加载配置失败，使用默认设置。",
+  "saveSuccess": "配置已成功保存。",
+  "saveConfig": "保存配置",
+  "resetDefaults": "恢复默认设置",
+  "engine": {
+    "title": "引擎",
+    "claudeCli": "Claude CLI",
+    "claudeCliDesc": "本地 Claude Code CLI 进程",
+    "claudeApi": "Claude API",
+    "claudeApiDesc": "直接 Anthropic API 集成"
+  },
+  "systemPrompt": {
+    "title": "系统提示词",
+    "placeholder": "输入 AI 代理的系统提示词..."
+  },
+  "maxTurns": {
+    "title": "最大轮次",
+    "description": "每个会话的最大对话轮次。"
+  },
+  "maxBudget": {
+    "title": "最大预算（美元）",
+    "description": "每个会话的最大 Token 费用。"
+  },
+  "allowedTools": {
+    "title": "允许的工具",
+    "selectAll": "全选",
+    "deselectAll": "全不选",
+    "tools": {
+      "Bash": "执行 Shell 命令",
+      "Read": "读取文件内容",
+      "Write": "写入/创建文件",
+      "Edit": "编辑现有文件",
+      "Glob": "按模式搜索文件",
+      "Grep": "搜索文件内容",
+      "WebFetch": "获取网页内容",
+      "WebSearch": "搜索网络",
+      "NotebookEdit": "编辑 Jupyter 笔记本",
+      "Task": "启动子代理任务"
+    }
+  },
+  "sdk": {
+    "title": "Agent SDK 配置",
+    "subtitle": "配置每个租户的 Claude Agent SDK 计费方式、审批流程和工具权限。",
+    "loading": "正在加载 SDK 配置...",
+    "loadError": "加载配置失败，使用默认设置。",
+    "billingMode": {
+      "title": "计费模式",
+      "subtitle": "选择该租户的 Claude Agent SDK 计费方式。",
+      "subscription": "订阅制",
+      "subscriptionDesc": "使用运维人员的 Claude 登录（无需 API 密钥）",
+      "apiKey": "API 密钥",
+      "apiKeyDesc": "租户自有的 Anthropic API 密钥（按 Token 计费）"
+    },
+    "apiKey": {
+      "label": "Anthropic API 密钥",
+      "configured": "密钥已配置",
+      "replacePlaceholder": "输入新密钥以替换现有密钥",
+      "placeholder": "sk-ant-...",
+      "remove": "移除",
+      "encryptionNote": "API 密钥在存储前已加密（AES-256-GCM），不会以明文存储。"
+    },
+    "approvalTimeout": {
+      "title": "L2 审批超时",
+      "subtitle": "对于高风险命令（L2），等待人工审批的时间，超时后自动批准。设置为 0 则禁用自动批准（无限等待）。",
+      "unit": "秒",
+      "autoApproveDisabled": "自动批准已禁用——命令将无限等待人工审批。",
+      "autoApproveAfter": "无响应 {{seconds}} 秒后命令将自动批准。"
+    },
+    "toolPermissions": {
+      "title": "工具权限",
+      "subtitle": "按租户覆盖工具访问权限。白名单为空时使用 RBAC 默认设置。黑名单中的工具无论角色如何都会被拒绝。",
+      "tool": "工具",
+      "description": "描述",
+      "whitelist": "白名单",
+      "blacklist": "黑名单",
+      "whitelistCount": "白名单：{{count}}",
+      "whitelistNone": "白名单：无（使用 RBAC 默认设置）",
+      "blacklistCount": "黑名单：{{count}}",
+      "blacklistNone": "黑名单：无"
+    },
+    "rbac": {
+      "title": "RBAC 工具访问（参考）",
+      "subtitle": "每个角色的默认工具访问权限（白名单为空时生效）。",
+      "admin": "管理员",
+      "adminTools": "全部工具（Bash, Read, Write, Edit, Glob, Grep, WebFetch, WebSearch, NotebookEdit, Task）",
+      "operator": "运维人员",
+      "operatorTools": "Bash, Read, Write, Edit, Glob, Grep",
+      "viewer": "只读用户",
+      "viewerTools": "Read, Glob, Grep（只读）"
+    }
+  },
+  "skills": {
+    "title": "技能",
+    "subtitle": "管理 AI 代理的 Claude Code 技能",
+    "addSkill": "添加技能",
+    "editSkill": "编辑技能",
+    "deleteSkill": "删除技能",
+    "loading": "正在加载技能...",
+    "loadError": "加载技能失败：",
+    "empty": "暂无配置的技能。",
+    "categories": {
+      "inspection": "巡检",
+      "deployment": "部署",
+      "maintenance": "维护",
+      "security": "安全",
+      "monitoring": "监控",
+      "custom": "自定义"
+    },
+    "form": {
+      "name": "名称",
+      "description": "描述",
+      "category": "分类",
+      "script": "脚本",
+      "tags": "标签",
+      "enabled": "启用"
+    },
+    "detail": {
+      "backToSkills": "返回技能列表",
+      "overview": "概览",
+      "promptTemplate": "提示词模板",
+      "allowedTools": "允许的工具",
+      "configuration": "配置",
+      "quickActions": "快捷操作",
+      "metadata": "元数据",
+      "duplicateSkill": "复制技能",
+      "deleteSkill": "删除技能",
+      "builtIn": "内置",
+      "custom": "自定义",
+      "enabled": "已启用",
+      "disabled": "已禁用",
+      "noPrompt": "未定义提示词模板。",
+      "noTools": "未配置工具。",
+      "notFound": "技能未找到。",
+      "loading": "正在加载技能..."
+    }
+  },
+  "hooks": {
+    "title": "钩子脚本",
+    "subtitle": "代理工具执行的生命周期脚本",
+    "addHook": "添加钩子",
+    "editHook": "编辑钩子",
+    "deleteHook": "删除钩子",
+    "loading": "正在加载钩子...",
+    "loadError": "加载钩子失败：",
+    "empty": "暂无配置的钩子。",
+    "infoBanner": "钩子脚本在代理工具调用前后运行。用于日志记录、验证或自定义副作用。",
+    "table": {
+      "name": "名称",
+      "event": "事件",
+      "toolPattern": "工具匹配",
+      "script": "脚本",
+      "enabled": "启用",
+      "actions": "操作"
+    },
+    "form": {
+      "name": "名称",
+      "eventType": "事件类型",
+      "toolPattern": "工具匹配",
+      "script": "脚本",
+      "timeout": "超时",
+      "enabled": "启用",
+      "description": "描述"
+    },
+    "events": {
+      "beforeTool": "工具执行前",
+      "afterTool": "工具执行后",
+      "onError": "出错时",
+      "onApproval": "审批时"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/audit.json b/it0-web-admin/src/i18n/locales/zh/audit.json
new file mode 100644
index 0000000..a1c3600
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/audit.json
@@ -0,0 +1,98 @@
+{
+  "logs": {
+    "title": "审计日志",
+    "subtitle": "查看所有操作和配置变更的不可篡改审计记录。",
+    "exportCsv": "导出 CSV",
+    "loading": "正在加载审计日志...",
+    "loadError": "加载审计日志失败：",
+    "empty": "当前筛选条件下暂无审计日志。",
+    "filters": {
+      "dateFrom": "起始日期",
+      "dateTo": "截止日期",
+      "actionType": "操作类型",
+      "actorType": "执行者类型",
+      "resourceType": "资源类型"
+    },
+    "table": {
+      "timestamp": "时间戳",
+      "action": "操作",
+      "actorType": "执行者类型",
+      "actorId": "执行者 ID",
+      "resourceType": "资源类型",
+      "resourceId": "资源 ID",
+      "description": "描述"
+    },
+    "pagination": {
+      "rowsPerPage": "每页行数",
+      "previous": "上一页",
+      "next": "下一页",
+      "pageOf": "第 {{current}} 页，共 {{total}} 页"
+    },
+    "fullDetail": "完整详情"
+  },
+  "replay": {
+    "title": "会话回放",
+    "subtitle": "查看代理会话的执行历史",
+    "loading": "正在加载会话...",
+    "loadError": "加载会话失败：",
+    "empty": "当前筛选条件下暂无会话。",
+    "showing": "显示 {{count}} / {{total}} 个会话",
+    "filters": {
+      "dateFrom": "起始日期",
+      "dateTo": "截止日期",
+      "status": "状态",
+      "search": "搜索",
+      "searchPlaceholder": "会话 ID 或任务描述..."
+    },
+    "statuses": {
+      "all": "全部",
+      "completed": "已完成",
+      "failed": "失败",
+      "cancelled": "已取消",
+      "running": "运行中"
+    },
+    "table": {
+      "sessionId": "会话 ID",
+      "taskDescription": "任务描述",
+      "status": "状态",
+      "duration": "时长",
+      "commands": "命令数",
+      "startedAt": "开始时间"
+    },
+    "panel": {
+      "title": "会话回放",
+      "close": "关闭",
+      "id": "ID：",
+      "duration": "时长：",
+      "commands": "命令数：",
+      "servers": "服务器："
+    },
+    "playback": {
+      "play": "播放",
+      "pause": "暂停",
+      "reset": "重置",
+      "showAll": "显示全部",
+      "speed": "速度：",
+      "events": "个事件",
+      "eventsProgress": "{{current}} / {{total}} 个事件"
+    },
+    "events": {
+      "loading": "正在加载会话事件...",
+      "loadError": "加载事件失败：",
+      "empty": "该会话暂无记录的事件。",
+      "pressPlay": "点击播放开始会话回放。",
+      "collapse": "收起",
+      "expandFullOutput": "展开完整输出",
+      "types": {
+        "commandExecuted": "命令已执行",
+        "outputReceived": "收到输出",
+        "approvalRequested": "请求审批",
+        "approvalGranted": "审批通过",
+        "approvalDenied": "审批拒绝",
+        "error": "错误",
+        "sessionStarted": "会话已开始",
+        "sessionCompleted": "会话已完成"
+      }
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/auth.json b/it0-web-admin/src/i18n/locales/zh/auth.json
new file mode 100644
index 0000000..252fd1f
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/auth.json
@@ -0,0 +1,35 @@
+{
+  "appTitle": "IT0",
+  "adminConsole": "管理控制台",
+  "signIn": "登录",
+  "signingIn": "登录中...",
+  "email": "邮箱",
+  "password": "密码",
+  "emailPlaceholder": "admin@example.com",
+  "noAccount": "还没有账号？",
+  "createOne": "立即注册",
+  "haveAccount": "已有账号？",
+  "signInLink": "去登录",
+  "createAccount": "创建账号",
+  "createAccountSubtitle": "注册新组织，开始使用。",
+  "fullName": "姓名",
+  "fullNamePlaceholder": "张三",
+  "organizationName": "组织名称",
+  "organizationNamePlaceholder": "示例公司",
+  "organizationHint": "将为您的组织创建一个新租户。",
+  "confirmPassword": "确认密码",
+  "creatingAccount": "创建中...",
+  "register": "创建账号",
+  "loginFailed": "登录失败",
+  "inviteTitle": "接受邀请",
+  "inviteSubtitle": "您已被邀请加入",
+  "inviteRole": "角色：",
+  "inviteEmail": "邮箱：",
+  "yourName": "您的姓名",
+  "choosePassword": "设置密码",
+  "joining": "加入中...",
+  "joinOrganization": "加入组织",
+  "inviteInvalid": "此邀请无效或已过期。",
+  "backToLogin": "返回登录",
+  "validatingInvite": "验证邀请中..."
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/common.json b/it0-web-admin/src/i18n/locales/zh/common.json
new file mode 100644
index 0000000..3d25188
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/common.json
@@ -0,0 +1,89 @@
+{
+  "save": "保存更改",
+  "saving": "保存中...",
+  "cancel": "取消",
+  "delete": "删除",
+  "deleting": "删除中...",
+  "edit": "编辑",
+  "create": "创建",
+  "creating": "创建中...",
+  "add": "添加",
+  "remove": "移除",
+  "close": "关闭",
+  "confirm": "确认",
+  "back": "返回",
+  "next": "下一步",
+  "loading": "加载中...",
+  "search": "搜索...",
+  "noResults": "未找到结果。",
+  "actions": "操作",
+  "name": "名称",
+  "type": "类型",
+  "status": "状态",
+  "description": "描述",
+  "created": "创建时间",
+  "updated": "更新时间",
+  "createdAt": "创建时间",
+  "updatedAt": "更新时间",
+  "required": "必填",
+  "optional": "可选",
+  "enabled": "已启用",
+  "disabled": "已禁用",
+  "active": "活跃",
+  "inactive": "未激活",
+  "pending": "待处理",
+  "running": "运行中",
+  "completed": "已完成",
+  "failed": "失败",
+  "error": "错误",
+  "success": "成功",
+  "warning": "警告",
+  "info": "信息",
+  "yes": "是",
+  "no": "否",
+  "none": "无",
+  "all": "全部",
+  "id": "ID",
+  "email": "邮箱",
+  "role": "角色",
+  "roles": "角色",
+  "environment": "环境",
+  "tags": "标签",
+  "priority": "优先级",
+  "severity": "严重程度",
+  "details": "详情",
+  "configuration": "配置",
+  "view": "查看",
+  "refresh": "刷新",
+  "export": "导出",
+  "import": "导入",
+  "copy": "复制",
+  "copied": "已复制！",
+  "never": "从未",
+  "unknown": "未知",
+  "notSelected": "未选择",
+  "comingSoon": "即将推出",
+  "noData": "暂无数据。",
+  "confirmDelete": "确定要删除吗？",
+  "operationSuccess": "操作成功。",
+  "operationFailed": "操作失败。",
+  "passwordsNoMatch": "两次密码不一致。",
+  "riskLevel": {
+    "l0": "只读",
+    "l1": "低风险",
+    "l2": "高风险",
+    "l3": "禁止"
+  },
+  "approvalStatus": {
+    "pending": "待审批",
+    "approved": "已批准",
+    "rejected": "已拒绝",
+    "expired": "已过期"
+  },
+  "serverStatus": {
+    "active": "在线",
+    "inactive": "离线",
+    "maintenance": "维护中",
+    "unreachable": "不可达"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/communication.json b/it0-web-admin/src/i18n/locales/zh/communication.json
new file mode 100644
index 0000000..4fc6517
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/communication.json
@@ -0,0 +1,106 @@
+{
+  "title": "通信设置",
+  "tabs": {
+    "channels": "通知渠道",
+    "contacts": "联系人",
+    "escalationPolicies": "升级策略"
+  },
+  "channels": {
+    "title": "通知渠道",
+    "subtitle": "配置通知的发送方式。",
+    "types": {
+      "push": "推送通知",
+      "sms": "短信",
+      "voice": "语音呼叫",
+      "email": "邮件",
+      "telegram": "Telegram",
+      "wechatWork": "企业微信",
+      "voiceService": "语音服务"
+    },
+    "configured": "已配置",
+    "notConfigured": "未配置",
+    "showConfig": "显示配置",
+    "hideConfig": "隐藏配置",
+    "saveConfiguration": "保存配置",
+    "saving": "正在保存...",
+    "saveSuccess": "渠道配置已保存。",
+    "fields": {
+      "apiKey": "API 密钥",
+      "apiSecret": "API 密钥密码",
+      "fromNumber": "发送号码",
+      "webhookUrl": "Webhook URL",
+      "botToken": "Bot Token",
+      "chatId": "Chat ID",
+      "corpId": "企业 ID",
+      "agentId": "应用 ID",
+      "secret": "密钥",
+      "smtpHost": "SMTP 主机",
+      "smtpPort": "SMTP 端口",
+      "username": "用户名",
+      "password": "密码",
+      "fromAddress": "发件地址",
+      "endpoint": "端点",
+      "enabled": "启用"
+    }
+  },
+  "contacts": {
+    "title": "联系人",
+    "subtitle": "管理通知接收人。",
+    "addContact": "添加联系人",
+    "editContact": "编辑联系人",
+    "deleteContact": "删除联系人",
+    "empty": "暂无配置的联系人。",
+    "form": {
+      "name": "姓名",
+      "email": "邮箱",
+      "phone": "电话",
+      "role": "角色",
+      "channels": "首选渠道"
+    },
+    "table": {
+      "name": "姓名",
+      "email": "邮箱",
+      "phone": "电话",
+      "role": "角色",
+      "channels": "渠道",
+      "actions": "操作"
+    }
+  },
+  "escalationPolicies": {
+    "title": "升级策略",
+    "subtitle": "定义告警未确认时的升级方式。",
+    "addPolicy": "添加策略",
+    "editPolicy": "编辑策略",
+    "deletePolicy": "删除策略",
+    "empty": "暂无配置的升级策略。",
+    "editSteps": "编辑步骤",
+    "collapseSteps": "收起",
+    "form": {
+      "name": "名称",
+      "description": "描述",
+      "severity": "触发严重级别",
+      "steps": "升级步骤"
+    },
+    "step": {
+      "title": "步骤 {{number}}",
+      "delay": "延迟",
+      "delayMinutes": "分钟",
+      "channels": "渠道",
+      "contacts": "联系人",
+      "addStep": "添加步骤",
+      "removeStep": "移除步骤"
+    },
+    "severityOptions": {
+      "info": "信息",
+      "warning": "警告",
+      "critical": "严重",
+      "fatal": "致命"
+    },
+    "table": {
+      "name": "名称",
+      "severity": "严重级别",
+      "steps": "步骤数",
+      "actions": "操作"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/dashboard.json b/it0-web-admin/src/i18n/locales/zh/dashboard.json
new file mode 100644
index 0000000..7ae16ec
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/dashboard.json
@@ -0,0 +1,27 @@
+{
+  "title": "仪表盘",
+  "subtitle": "系统概览和近期活动",
+  "stats": {
+    "totalServers": "服务器总数",
+    "activeAlerts": "活跃告警",
+    "runningTasks": "运行中任务",
+    "standingOrders": "常驻指令"
+  },
+  "recentAlerts": {
+    "title": "近期告警",
+    "severity": "严重级别",
+    "message": "告警信息",
+    "server": "服务器",
+    "time": "时间",
+    "empty": "暂无近期告警。",
+    "viewAll": "查看全部告警"
+  },
+  "recentTasks": {
+    "title": "近期任务",
+    "name": "任务名称",
+    "status": "状态",
+    "created": "创建时间",
+    "empty": "暂无近期任务。",
+    "viewAll": "查看全部任务"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/monitoring.json b/it0-web-admin/src/i18n/locales/zh/monitoring.json
new file mode 100644
index 0000000..a48f6fd
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/monitoring.json
@@ -0,0 +1,173 @@
+{
+  "alertRules": {
+    "title": "告警规则",
+    "subtitle": "配置告警规则以监控服务器指标并接收通知。",
+    "addRule": "添加规则",
+    "editRule": "编辑规则",
+    "deleteRule": "删除告警规则",
+    "loading": "正在加载告警规则...",
+    "loadError": "加载告警规则失败：",
+    "empty": "暂无告警规则。",
+    "table": {
+      "name": "名称",
+      "metric": "指标",
+      "condition": "条件",
+      "threshold": "阈值",
+      "severity": "严重级别",
+      "enabled": "启用",
+      "actions": "操作"
+    },
+    "form": {
+      "name": "名称",
+      "description": "描述",
+      "metric": "指标",
+      "condition": "条件",
+      "threshold": "阈值",
+      "severity": "严重级别",
+      "notifyChannels": "通知渠道",
+      "notifyChannelsPlaceholder": "邮件、Slack、Webhook（逗号分隔）",
+      "cooldownMinutes": "冷却时间（分钟）",
+      "enabled": "启用"
+    },
+    "validation": {
+      "nameRequired": "名称不能为空",
+      "metricRequired": "指标不能为空",
+      "thresholdRequired": "请输入有效的阈值",
+      "cooldownRequired": "请输入有效的冷却时间"
+    },
+    "metrics": {
+      "cpuUsage": "CPU 使用率",
+      "memoryUsage": "内存使用率",
+      "diskUsage": "磁盘使用率",
+      "networkLatency": "网络延迟",
+      "httpErrorRate": "HTTP 错误率",
+      "custom": "自定义"
+    },
+    "conditions": {
+      "greaterThan": ">（大于）",
+      "lessThan": "<（小于）",
+      "equal": "==（等于）",
+      "greaterOrEqual": ">=（大于等于）",
+      "lessOrEqual": "<=（小于等于）"
+    },
+    "severities": {
+      "info": "信息",
+      "warning": "警告",
+      "critical": "严重",
+      "fatal": "致命"
+    },
+    "deleteConfirm": "确定要删除该规则吗？这将停止所有后续告警，且无法撤销。",
+    "detail": {
+      "backToAlertRules": "返回告警规则",
+      "ruleConfiguration": "规则配置",
+      "recentAlertEvents": "近期告警事件",
+      "ruleSummary": "规则摘要",
+      "notifyChannels": "通知渠道",
+      "quickActions": "快捷操作",
+      "metadata": "元数据",
+      "ruleExpression": "规则表达式",
+      "loading": "正在加载告警规则...",
+      "loadError": "加载告警规则失败：",
+      "noDescription": "无描述",
+      "noneConfigured": "未配置",
+      "noNotificationChannels": "未配置通知渠道。",
+      "noAlertEvents": "该规则尚未触发任何告警事件。",
+      "disableRule": "禁用规则",
+      "enableRule": "启用规则",
+      "editRule": "编辑规则",
+      "deleteRule": "删除规则",
+      "updating": "正在更新...",
+      "failedToUpdate": "更新规则失败：",
+      "ruleId": "规则 ID",
+      "cooldown": "冷却时间",
+      "totalEvents": "事件总数",
+      "eventTable": {
+        "severity": "严重级别",
+        "metric": "指标",
+        "value": "值",
+        "threshold": "阈值",
+        "message": "信息",
+        "status": "状态",
+        "triggered": "触发时间"
+      },
+      "eventStatus": {
+        "resolved": "已解决",
+        "active": "活跃"
+      }
+    }
+  },
+  "healthChecks": {
+    "title": "健康检查",
+    "subtitle": "监控服务器健康状态和可用性",
+    "loading": "正在加载健康检查...",
+    "loadError": "加载健康检查失败：",
+    "empty": "暂无健康检查。",
+    "noMatchingStatus": "未找到状态为「{{status}}」的服务器。",
+    "autoRefresh": "自动刷新：",
+    "live": "实时",
+    "refreshOptions": {
+      "off": "关闭",
+      "10s": "10秒",
+      "30s": "30秒",
+      "60s": "60秒"
+    },
+    "stats": {
+      "totalServers": "服务器总数",
+      "healthy": "健康",
+      "degraded": "降级",
+      "down": "宕机"
+    },
+    "filters": {
+      "all": "全部",
+      "healthy": "健康",
+      "degraded": "降级",
+      "down": "宕机"
+    },
+    "card": {
+      "latency": "延迟",
+      "uptime24h": "可用率（24小时）",
+      "lastCheck": "最近检查"
+    },
+    "checkTypes": {
+      "ping": "Ping",
+      "tcp": "TCP",
+      "http": "HTTP"
+    }
+  },
+  "metrics": {
+    "title": "指标面板",
+    "subtitle": "监控服务器性能和资源使用率",
+    "loading": "正在加载服务器指标...",
+    "loadError": "加载服务器指标失败：",
+    "empty": "暂无服务器指标数据。",
+    "noMatchingFilters": "没有匹配当前筛选条件的服务器。",
+    "autoRefresh": "自动刷新（30秒）",
+    "live": "实时",
+    "searchPlaceholder": "按主机名搜索...",
+    "showing": "显示 {{count}} / {{total}} 台服务器",
+    "overview": {
+      "totalServers": "服务器总数",
+      "online": "在线率",
+      "avgCpu": "平均 CPU",
+      "avgMemory": "平均内存",
+      "alertsToday": "今日告警"
+    },
+    "filters": {
+      "all": "全部",
+      "dev": "开发",
+      "staging": "预发布",
+      "prod": "生产",
+      "online": "在线",
+      "offline": "离线"
+    },
+    "table": {
+      "hostname": "主机名",
+      "env": "环境",
+      "status": "状态",
+      "cpuPercent": "CPU %",
+      "memoryPercent": "内存 %",
+      "diskPercent": "磁盘 %",
+      "lastChecked": "最近检查"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/runbooks.json b/it0-web-admin/src/i18n/locales/zh/runbooks.json
new file mode 100644
index 0000000..5f96d0b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/runbooks.json
@@ -0,0 +1,75 @@
+{
+  "title": "运维手册",
+  "subtitle": "管理运维手册和自动化脚本。",
+  "newRunbook": "新建手册",
+  "loading": "正在加载运维手册...",
+  "loadError": "加载运维手册失败：",
+  "empty": "暂无运维手册。",
+  "triggerTypes": {
+    "manual": "手动",
+    "alert": "告警触发",
+    "scheduled": "定时触发"
+  },
+  "riskLevels": {
+    "0": "L0 - 信息",
+    "1": "L1 - 低风险",
+    "2": "L2 - 中风险",
+    "3": "L3 - 高风险"
+  },
+  "form": {
+    "name": "名称",
+    "description": "描述",
+    "triggerType": "触发类型",
+    "promptTemplate": "提示词模板",
+    "allowedTools": "允许的工具",
+    "maxRiskLevel": "最大风险等级",
+    "autoApprove": "自动审批",
+    "enabled": "启用"
+  },
+  "table": {
+    "name": "名称",
+    "description": "描述",
+    "trigger": "触发方式",
+    "maxRisk": "最大风险",
+    "autoApprove": "自动审批",
+    "actions": "操作"
+  },
+  "deleteDialog": {
+    "title": "删除运维手册",
+    "message": "确定要删除该运维手册吗？此操作不可撤销。所有执行历史也将被移除。"
+  },
+  "detail": {
+    "backToRunbooks": "返回运维手册列表",
+    "back": "返回",
+    "overview": "概览",
+    "promptTemplate": "提示词模板",
+    "allowedTools": "允许的工具",
+    "executionHistory": "执行历史",
+    "configuration": "配置",
+    "quickActions": "快捷操作",
+    "loading": "正在加载运维手册...",
+    "loadError": "加载运维手册失败：",
+    "notFound": "运维手册未找到。",
+    "noDescription": "暂无描述。",
+    "noPrompt": "未定义提示词模板。",
+    "noTools": "未配置工具。",
+    "noExecutions": "暂无执行记录。",
+    "enableToExecute": "启用手册后才能执行。",
+    "triggerType": "触发类型",
+    "maxRiskLevel": "最大风险等级",
+    "autoApprove": "自动审批",
+    "autoApproveDescription": "在配置的风险等级内自动审批操作。",
+    "statusLabel": "状态",
+    "executeNow": "立即执行",
+    "executing": "正在执行...",
+    "duplicate": "复制",
+    "duplicating": "正在复制...",
+    "deleteRunbook": "删除运维手册",
+    "executionTable": {
+      "date": "日期",
+      "status": "状态",
+      "duration": "时长",
+      "triggeredBy": "触发者"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/security.json b/it0-web-admin/src/i18n/locales/zh/security.json
new file mode 100644
index 0000000..0f00179
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/security.json
@@ -0,0 +1,151 @@
+{
+  "title": "安全与风险规则",
+  "subtitle": "配置命令风险分类规则和安全策略。",
+  "riskRules": {
+    "title": "命令风险规则",
+    "addRule": "添加规则",
+    "editRule": "编辑规则",
+    "deleteRule": "删除规则",
+    "loading": "正在加载风险规则...",
+    "loadError": "加载风险规则失败：",
+    "empty": "暂无配置的风险规则。",
+    "table": {
+      "pattern": "匹配模式",
+      "riskLevel": "风险等级",
+      "action": "处理方式",
+      "description": "描述",
+      "actions": "操作"
+    },
+    "form": {
+      "pattern": "匹配模式",
+      "patternPlaceholder": "rm -rf *、sudo * 等",
+      "riskLevel": "风险等级",
+      "action": "处理方式",
+      "description": "描述"
+    },
+    "riskLevels": {
+      "0": "0 - 无风险",
+      "1": "1 - 低风险",
+      "2": "2 - 中风险",
+      "3": "3 - 高风险"
+    },
+    "actions": {
+      "allow": "允许",
+      "block": "阻止",
+      "requireApproval": "需要审批"
+    }
+  },
+  "permissionMatrix": {
+    "title": "权限矩阵",
+    "roles": {
+      "admin": "管理员",
+      "operator": "运维人员",
+      "viewer": "只读用户",
+      "readonly": "只读"
+    },
+    "permissions": {
+      "manageServers": "管理服务器",
+      "executeCommands": "执行命令",
+      "viewAudit": "查看审计",
+      "manageUsers": "管理用户",
+      "approveCommands": "审批命令"
+    },
+    "savePermissions": "保存权限"
+  },
+  "credentials": {
+    "title": "凭据",
+    "subtitle": "管理服务器连接的 SSH 凭据",
+    "addCredential": "添加凭据",
+    "editCredential": "编辑凭据",
+    "deleteCredential": "删除凭据",
+    "testCredential": "测试",
+    "loading": "正在加载凭据...",
+    "loadError": "加载凭据失败：",
+    "empty": "暂无凭据。",
+    "securityNotice": "凭据以加密方式存储，仅在使用时解密。",
+    "authTypes": {
+      "password": "密码",
+      "sshKey": "SSH 密钥",
+      "sshKeyPassphrase": "SSH 密钥 + 密码短语"
+    },
+    "table": {
+      "name": "名称",
+      "type": "类型",
+      "username": "用户名",
+      "associatedServers": "关联服务器",
+      "created": "创建时间",
+      "actions": "操作"
+    },
+    "form": {
+      "name": "名称",
+      "authType": "认证类型",
+      "username": "用户名",
+      "password": "密码",
+      "privateKey": "私钥",
+      "passphrase": "密码短语",
+      "servers": "关联服务器"
+    },
+    "encryptionWarning": "加密数据保存后无法检索。"
+  },
+  "roles": {
+    "title": "角色",
+    "subtitle": "管理角色及其关联的权限",
+    "addRole": "添加角色",
+    "editRole": "编辑角色",
+    "deleteRole": "删除角色",
+    "loading": "正在加载角色...",
+    "loadError": "加载角色失败：",
+    "empty": "暂无角色。",
+    "builtIn": "内置",
+    "custom": "自定义",
+    "showPerms": "权限",
+    "hidePerms": "隐藏权限",
+    "assignedPermissions": "已分配的权限",
+    "savingPermissions": "正在保存权限...",
+    "table": {
+      "name": "名称",
+      "description": "描述",
+      "type": "类型",
+      "permissions": "权限",
+      "users": "用户",
+      "created": "创建时间",
+      "actions": "操作"
+    },
+    "form": {
+      "name": "名称",
+      "description": "描述"
+    }
+  },
+  "permissions": {
+    "title": "权限",
+    "subtitle": "查看和管理各角色的权限矩阵",
+    "loading": "正在加载权限矩阵...",
+    "loadError": "加载权限失败：",
+    "empty": "暂无权限。",
+    "resource": "资源",
+    "permission": "权限",
+    "action": "操作",
+    "details": "权限详情",
+    "actionTypes": {
+      "create": "创建",
+      "read": "读取",
+      "update": "更新",
+      "delete": "删除",
+      "execute": "执行"
+    },
+    "summary": {
+      "title": "统计",
+      "totalPermissions": "权限总数",
+      "totalRoles": "角色总数",
+      "resources": "资源数",
+      "granted": "已授权"
+    },
+    "detailDialog": {
+      "title": "权限详情",
+      "key": "键",
+      "resource": "资源",
+      "action": "操作",
+      "description": "描述"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/servers.json b/it0-web-admin/src/i18n/locales/zh/servers.json
new file mode 100644
index 0000000..b4484a0
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/servers.json
@@ -0,0 +1,97 @@
+{
+  "title": "服务器",
+  "subtitle": "管理服务器资源、集群和 SSH 配置。",
+  "addServer": "添加服务器",
+  "editServer": "编辑服务器",
+  "deleteServer": "删除服务器",
+  "loading": "正在加载服务器...",
+  "loadError": "加载服务器失败：",
+  "empty": "暂无服务器。",
+  "filters": {
+    "all": "全部",
+    "dev": "开发",
+    "staging": "预发布",
+    "prod": "生产"
+  },
+  "table": {
+    "hostname": "主机名",
+    "host": "主机地址",
+    "environment": "环境",
+    "role": "角色",
+    "status": "状态",
+    "actions": "操作"
+  },
+  "form": {
+    "hostname": "主机名",
+    "hostIp": "主机地址（IP）",
+    "sshPort": "SSH 端口",
+    "environment": "环境",
+    "role": "角色",
+    "tags": "标签",
+    "description": "描述",
+    "tagsPlaceholder": "标签1, 标签2（逗号分隔）",
+    "descriptionPlaceholder": "可选描述..."
+  },
+  "validation": {
+    "hostnameRequired": "主机名不能为空",
+    "hostRequired": "主机地址不能为空"
+  },
+  "dialog": {
+    "deleteConfirm": "确定要删除",
+    "deleteWarning": "此操作不可撤销。该服务器及所有关联数据将被永久移除。"
+  },
+  "detail": {
+    "backToServers": "返回服务器列表",
+    "serverInformation": "服务器信息",
+    "recentHealthChecks": "近期健康检查",
+    "recentCommands": "近期命令",
+    "quickActions": "快捷操作",
+    "connectionInfo": "连接信息",
+    "tags": "标签",
+    "noTags": "未分配标签。",
+    "loading": "正在加载服务器详情...",
+    "loadError": "加载服务器失败：",
+    "noHealthChecks": "暂无健康检查记录。",
+    "noCommands": "该服务器上暂无已执行的命令。",
+    "saveChanges": "保存更改",
+    "openTerminal": "打开终端",
+    "runHealthCheck": "运行健康检查",
+    "editServer": "编辑服务器",
+    "deleteServer": "删除服务器",
+    "healthCheckTable": {
+      "status": "状态",
+      "latency": "延迟",
+      "message": "信息",
+      "time": "时间"
+    },
+    "commandsTable": {
+      "command": "命令",
+      "exitCode": "退出码",
+      "risk": "风险",
+      "time": "时间"
+    }
+  },
+  "clusters": {
+    "title": "集群",
+    "subtitle": "将服务器组织为逻辑分组",
+    "addCluster": "添加集群",
+    "editCluster": "编辑集群",
+    "deleteCluster": "删除集群",
+    "loading": "正在加载集群...",
+    "loadError": "加载集群失败：",
+    "empty": "暂无集群。",
+    "form": {
+      "name": "名称",
+      "description": "描述",
+      "environment": "环境",
+      "tags": "标签",
+      "servers": "服务器"
+    },
+    "health": {
+      "online": "在线",
+      "offline": "离线",
+      "maintenance": "维护中",
+      "noServers": "暂无服务器"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/sessions.json b/it0-web-admin/src/i18n/locales/zh/sessions.json
new file mode 100644
index 0000000..8b2a1b8
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/sessions.json
@@ -0,0 +1,46 @@
+{
+  "title": "会话",
+  "subtitle": "查看和管理代理会话",
+  "loading": "正在加载会话...",
+  "loadError": "加载会话失败：",
+  "empty": "暂无会话。",
+  "statuses": {
+    "running": "运行中",
+    "completed": "已完成",
+    "failed": "失败",
+    "cancelled": "已取消"
+  },
+  "detail": {
+    "title": "会话",
+    "backToSessions": "返回会话列表",
+    "sessionInformation": "会话信息",
+    "eventStream": "事件流",
+    "statistics": "统计",
+    "tasks": "任务",
+    "serverTargets": "目标服务器",
+    "timestamps": "时间戳",
+    "loading": "正在加载会话详情...",
+    "loadError": "加载会话失败：",
+    "autoScroll": "自动滚动",
+    "liveStreaming": "实时 -- 正在接收事件...",
+    "noEvents": "暂无事件记录。",
+    "noTasks": "此会话暂无任务。",
+    "info": {
+      "sessionId": "会话 ID",
+      "status": "状态",
+      "engine": "引擎",
+      "startedAt": "开始时间",
+      "endedAt": "结束时间",
+      "duration": "时长",
+      "tokenCount": "Token 数",
+      "totalCost": "总费用",
+      "task": "任务"
+    },
+    "engines": {
+      "claudeCli": "Claude Code CLI",
+      "claudeApi": "Claude API"
+    },
+    "inProgressDuration": "进行中...",
+    "inProgressStatus": "进行中"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/settings.json b/it0-web-admin/src/i18n/locales/zh/settings.json
new file mode 100644
index 0000000..cf242f8
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/settings.json
@@ -0,0 +1,79 @@
+{
+  "title": "设置",
+  "subtitle": "应用偏好和配置。",
+  "sections": {
+    "general": "通用",
+    "notifications": "通知",
+    "apikeys": "API 密钥",
+    "theme": "主题",
+    "account": "账户"
+  },
+  "general": {
+    "title": "通用设置",
+    "platformName": "平台名称",
+    "platformNamePlaceholder": "IT0 平台",
+    "defaultTimezone": "默认时区",
+    "defaultLanguage": "默认语言",
+    "uiLanguage": "界面语言",
+    "uiLanguageHint": "更改当前浏览器的显示语言。",
+    "autoApproveThreshold": "自动审批阈值（风险等级 0-3）",
+    "autoApproveHint": "低于或等于此风险等级的操作将被自动批准。",
+    "saved": "设置已保存。"
+  },
+  "notifications": {
+    "title": "通知设置",
+    "email": "邮件通知",
+    "sms": "短信通知",
+    "push": "推送通知",
+    "escalationPolicy": "默认升级策略",
+    "saved": "通知设置已保存。"
+  },
+  "apikeys": {
+    "title": "API 密钥",
+    "namePlaceholder": "密钥名称（例如 CI/CD 流水线）",
+    "generate": "生成新密钥",
+    "generatedWarning": "新 API 密钥已生成。请立即复制 ——之后将无法再次查看。",
+    "copyToClipboard": "复制到剪贴板",
+    "dismiss": "关闭",
+    "headerName": "名称",
+    "headerKey": "密钥",
+    "headerCreated": "创建时间",
+    "headerLastUsed": "最后使用",
+    "headerActions": "操作",
+    "revoke": "吊销",
+    "noKeys": "暂无 API 密钥。在上方生成一个。"
+  },
+  "theme": {
+    "title": "主题",
+    "appearance": "外观",
+    "light": "浅色",
+    "dark": "深色",
+    "primaryColor": "主题色",
+    "customColor": "自定义颜色",
+    "selected": "已选：{{color}}",
+    "saveTheme": "保存主题",
+    "saved": "主题设置已保存。"
+  },
+  "account": {
+    "profileTitle": "账户资料",
+    "displayName": "显示名称",
+    "email": "邮箱",
+    "emailHint": "邮箱无法在此处修改。",
+    "saveProfile": "保存资料",
+    "profileSaved": "资料已更新。",
+    "changePassword": "修改密码",
+    "currentPassword": "当前密码",
+    "newPassword": "新密码",
+    "confirmPassword": "确认新密码",
+    "passwordChanged": "密码修改成功。",
+    "changing": "修改中..."
+  },
+  "languages": {
+    "en": "English",
+    "zh": "中文",
+    "ko": "한국어",
+    "ja": "日本語",
+    "de": "Deutsch",
+    "fr": "Français"
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/sidebar.json b/it0-web-admin/src/i18n/locales/zh/sidebar.json
new file mode 100644
index 0000000..999fb01
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/sidebar.json
@@ -0,0 +1,33 @@
+{
+  "appName": "IT0 管理",
+  "appSubtitle": "运维控制台",
+  "dashboard": "仪表盘",
+  "agentConfig": "智能体配置",
+  "enginePrompt": "引擎与提示词",
+  "sdkConfig": "SDK 配置",
+  "skills": "技能",
+  "hooks": "钩子脚本",
+  "runbooks": "运维手册",
+  "standingOrders": "常驻指令",
+  "servers": "服务器",
+  "allServers": "全部服务器",
+  "clusters": "集群",
+  "monitoring": "监控",
+  "alertRules": "告警规则",
+  "healthChecks": "健康检查",
+  "metrics": "指标",
+  "terminal": "终端",
+  "security": "安全",
+  "riskRules": "风险规则",
+  "credentials": "凭证管理",
+  "roles": "角色",
+  "permissions": "权限",
+  "audit": "审计",
+  "logs": "日志",
+  "sessionReplay": "会话回放",
+  "communication": "通讯",
+  "tenants": "租户",
+  "users": "用户",
+  "settings": "设置",
+  "collapse": "折叠"
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/standing-orders.json b/it0-web-admin/src/i18n/locales/zh/standing-orders.json
new file mode 100644
index 0000000..ad23069
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/standing-orders.json
@@ -0,0 +1,111 @@
+{
+  "title": "常驻指令",
+  "subtitle": "管理自主运维任务和执行计划。",
+  "newOrder": "新建常驻指令",
+  "loading": "正在加载常驻指令...",
+  "loadError": "加载常驻指令失败：",
+  "empty": "暂无常驻指令。",
+  "triggerTypes": {
+    "cron": "定时计划",
+    "event": "事件触发",
+    "threshold": "阈值触发"
+  },
+  "statuses": {
+    "active": "活跃",
+    "paused": "已暂停"
+  },
+  "form": {
+    "name": "名称",
+    "description": "描述",
+    "triggerType": "触发类型",
+    "triggerConfiguration": "触发配置",
+    "cronExpression": "Cron 表达式",
+    "eventType": "事件类型",
+    "metric": "指标",
+    "condition": "条件",
+    "thresholdValue": "阈值",
+    "targetServers": "目标服务器",
+    "targetServersPlaceholder": "server-1, server-2（逗号分隔）",
+    "agentInstruction": "代理指令",
+    "maxBudget": "最大预算（美元）",
+    "escalateOnFailure": "失败时升级"
+  },
+  "table": {
+    "name": "名称",
+    "trigger": "触发方式",
+    "status": "状态",
+    "lastExecution": "最近执行",
+    "nextRun": "下次运行",
+    "actions": "操作"
+  },
+  "executionHistory": {
+    "title": "执行历史",
+    "loading": "正在加载执行记录...",
+    "loadError": "加载执行记录失败：",
+    "empty": "暂无执行记录。",
+    "table": {
+      "date": "日期",
+      "status": "状态",
+      "duration": "时长",
+      "commands": "命令数",
+      "summary": "摘要",
+      "cost": "费用"
+    },
+    "executionStatuses": {
+      "running": "运行中",
+      "completed": "已完成",
+      "failed": "失败"
+    },
+    "executionSummary": "执行摘要",
+    "noSummary": "暂无摘要。",
+    "inProgress": "进行中...",
+    "started": "开始时间：",
+    "ended": "结束时间："
+  },
+  "deleteDialog": {
+    "title": "删除常驻指令",
+    "message": "确定要删除该常驻指令吗？这将停止所有后续执行，且无法撤销。"
+  },
+  "detail": {
+    "backToStandingOrders": "返回常驻指令列表",
+    "overview": "概览",
+    "triggerConfiguration": "触发配置",
+    "agentInstruction": "代理指令",
+    "targetServers": "目标服务器",
+    "noTargetServers": "未配置目标服务器。",
+    "maxBudget": "最大预算",
+    "statusAndControls": "状态与控制",
+    "quickActions": "快捷操作",
+    "statistics": "统计",
+    "metadata": "元数据",
+    "loading": "正在加载常驻指令...",
+    "loadError": "加载常驻指令失败：",
+    "notFound": "常驻指令未找到。",
+    "pauseOrder": "暂停指令",
+    "activateOrder": "激活指令",
+    "executeNow": "立即执行",
+    "triggering": "正在触发...",
+    "executionTriggered": "已成功触发执行。",
+    "edit": "编辑",
+    "editStandingOrder": "编辑常驻指令",
+    "viewLogs": "查看日志",
+    "delete": "删除",
+    "escalateOnFailure": "失败时升级",
+    "lastExecution": "最近执行",
+    "nextRun": "下次运行",
+    "expression": "表达式：",
+    "eventType": "事件类型：",
+    "stats": {
+      "totalExecutions": "总执行次数",
+      "successRate": "成功率",
+      "avgDuration": "平均时长",
+      "lastFailure": "最近失败"
+    },
+    "pagination": {
+      "showing": "显示 {{from}} - {{to}}，共 {{total}}",
+      "previous": "上一页",
+      "next": "下一页",
+      "pageOf": "第 {{current}} 页，共 {{total}} 页"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/tenants.json b/it0-web-admin/src/i18n/locales/zh/tenants.json
new file mode 100644
index 0000000..c57d63b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/tenants.json
@@ -0,0 +1,107 @@
+{
+  "title": "租户管理",
+  "subtitle": "管理租户、套餐和资源配额。",
+  "newTenant": "+ 新建租户",
+  "createTenant": "创建新租户",
+  "loading": "正在加载租户...",
+  "loadError": "加载租户失败：",
+  "empty": "暂无租户。创建第一个租户以开始使用。",
+  "form": {
+    "name": "名称",
+    "slug": "标识符",
+    "plan": "套餐",
+    "adminEmail": "管理员邮箱",
+    "status": "状态"
+  },
+  "plans": {
+    "free": "免费版",
+    "pro": "专业版",
+    "enterprise": "企业版"
+  },
+  "statuses": {
+    "active": "活跃",
+    "suspended": "已停用"
+  },
+  "table": {
+    "name": "名称",
+    "slug": "标识符",
+    "plan": "套餐",
+    "status": "状态",
+    "users": "用户数",
+    "created": "创建时间",
+    "actions": "操作"
+  },
+  "actions": {
+    "suspend": "停用",
+    "activate": "激活",
+    "quotas": "配额",
+    "hideQuotas": "隐藏配额"
+  },
+  "quotas": {
+    "title": "资源配额",
+    "maxServers": "最大服务器数",
+    "maxUsers": "最大用户数",
+    "maxStandingOrders": "最大常驻指令数",
+    "maxAgentTokens": "每月最大代理 Token 数"
+  },
+  "createDialog": {
+    "create": "创建租户",
+    "creating": "正在创建..."
+  },
+  "detail": {
+    "backToTenants": "返回租户列表",
+    "tenantInformation": "租户信息",
+    "members": "成员",
+    "invitations": "邀请",
+    "quickActions": "快捷操作",
+    "metadata": "元数据",
+    "loading": "正在加载租户详情...",
+    "loadError": "加载租户失败：",
+    "failedToUpdate": "更新租户失败：",
+    "schemaName": "Schema 名称",
+    "memberCount": "成员数",
+    "noMembers": "暂无成员。",
+    "noInvitations": "尚未发送任何邀请。",
+    "inviteUser": "+ 邀请用户",
+    "sendInvite": "发送邀请",
+    "sending": "正在发送...",
+    "revoke": "撤销",
+    "suspendTenant": "停用租户",
+    "activateTenant": "激活租户",
+    "viewAuditLog": "查看审计日志",
+    "editTenant": "编辑租户",
+    "deleteTenant": "删除租户",
+    "tenantId": "租户 ID",
+    "slug": "标识符",
+    "schema": "Schema",
+    "membersTable": {
+      "name": "姓名",
+      "email": "邮箱",
+      "role": "角色",
+      "joined": "加入时间"
+    },
+    "invitesTable": {
+      "email": "邮箱",
+      "role": "角色",
+      "status": "状态",
+      "actions": "操作"
+    },
+    "inviteForm": {
+      "email": "邮箱",
+      "emailPlaceholder": "user@example.com",
+      "role": "角色",
+      "roles": {
+        "viewer": "只读用户",
+        "operator": "运维人员",
+        "admin": "管理员"
+      }
+    },
+    "deleteDialog": {
+      "title": "删除租户",
+      "message": "确定要删除该租户吗？这将永久移除该租户的所有数据和成员关联关系。此操作不可撤销。"
+    },
+    "validation": {
+      "nameRequired": "名称不能为空"
+    }
+  }
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/terminal.json b/it0-web-admin/src/i18n/locales/zh/terminal.json
new file mode 100644
index 0000000..765275b
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/terminal.json
@@ -0,0 +1,35 @@
+{
+  "title": "终端",
+  "subtitle": "远程 Shell 访问",
+  "connection": {
+    "connected": "已连接",
+    "connecting": "正在连接...",
+    "disconnected": "已断开"
+  },
+  "server": {
+    "label": "服务器：",
+    "selectServer": "选择服务器",
+    "loadingServers": "正在加载服务器..."
+  },
+  "actions": {
+    "connect": "连接",
+    "disconnect": "断开",
+    "clear": "清屏"
+  },
+  "noServerSelected": "未选择服务器",
+  "selectServerPrompt": "选择一台服务器并点击连接以启动终端会话。",
+  "messages": {
+    "connected": "已连接到 {{server}}",
+    "disconnected": "已断开与服务器的连接。",
+    "connectionFailed": "连接失败：",
+    "reconnecting": "正在重新连接...",
+    "sessionTimeout": "会话已超时。"
+  },
+  "shortcuts": {
+    "title": "键盘快捷键",
+    "sendCommand": "发送命令",
+    "commandHistory": "命令历史",
+    "clearTerminal": "清除终端"
+  },
+  "placeholder": "输入命令..."
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/topbar.json b/it0-web-admin/src/i18n/locales/zh/topbar.json
new file mode 100644
index 0000000..8a38a58
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/topbar.json
@@ -0,0 +1,10 @@
+{
+  "search": "搜索...",
+  "shortcutKey": "⌘K",
+  "tenant": "租户：",
+  "notSelected": "未选择",
+  "settings": "设置",
+  "users": "用户",
+  "signOut": "退出登录",
+  "defaultUser": "用户"
+}
diff --git a/it0-web-admin/src/i18n/locales/zh/users.json b/it0-web-admin/src/i18n/locales/zh/users.json
new file mode 100644
index 0000000..d683ad7
--- /dev/null
+++ b/it0-web-admin/src/i18n/locales/zh/users.json
@@ -0,0 +1,89 @@
+{
+  "title": "用户",
+  "subtitle": "管理用户账户和访问权限",
+  "addUser": "添加用户",
+  "loading": "正在加载用户...",
+  "loadError": "加载用户失败：",
+  "empty": "暂无用户。添加一个用户以开始使用。",
+  "noMatchingFilters": "没有匹配当前筛选条件的用户。",
+  "showing": "显示 {{count}} / {{total}} 个用户",
+  "searchPlaceholder": "按姓名或邮箱搜索...",
+  "allRoles": "全部角色",
+  "roles": {
+    "admin": "管理员",
+    "operator": "运维人员",
+    "viewer": "只读用户"
+  },
+  "statuses": {
+    "active": "活跃",
+    "disabled": "已禁用"
+  },
+  "table": {
+    "name": "姓名",
+    "email": "邮箱",
+    "role": "角色",
+    "tenant": "租户",
+    "status": "状态",
+    "lastLogin": "最近登录",
+    "created": "创建时间",
+    "actions": "操作"
+  },
+  "form": {
+    "displayName": "显示名称",
+    "email": "邮箱",
+    "password": "密码",
+    "role": "角色",
+    "tenantId": "租户 ID"
+  },
+  "createDialog": {
+    "title": "添加用户",
+    "create": "创建用户",
+    "creating": "正在创建..."
+  },
+  "editDialog": {
+    "title": "编辑用户：",
+    "save": "保存更改",
+    "saving": "正在保存..."
+  },
+  "deleteDialog": {
+    "title": "删除用户",
+    "message": "确定要删除该用户吗？此操作不可撤销。",
+    "warning": "该用户将失去所有访问权限，其会话将被立即终止。"
+  },
+  "validation": {
+    "displayNameRequired": "显示名称不能为空",
+    "emailRequired": "邮箱不能为空",
+    "passwordRequired": "密码不能为空"
+  },
+  "detail": {
+    "backToUsers": "返回用户列表",
+    "userInformation": "用户信息",
+    "activityLog": "活动日志",
+    "quickActions": "快捷操作",
+    "accountSummary": "账户摘要",
+    "loading": "正在加载用户详情...",
+    "loadError": "加载用户失败：",
+    "failedToUpdate": "更新用户失败：",
+    "noActivity": "暂无活动记录。",
+    "editUser": "编辑用户",
+    "resetPassword": "重置密码",
+    "deleteUser": "删除用户",
+    "memberSince": "注册时间",
+    "lastLogin": "最近登录",
+    "activityTable": {
+      "action": "操作",
+      "resource": "资源",
+      "details": "详情",
+      "ipAddress": "IP 地址",
+      "time": "时间"
+    },
+    "resetPasswordDialog": {
+      "title": "重置密码",
+      "message": "这将向该用户的邮箱发送密码重置链接。用户需要设置新密码。",
+      "sendResetLink": "发送重置链接",
+      "sending": "正在发送...",
+      "success": "密码重置链接已发送至用户邮箱。",
+      "done": "完成"
+    }
+  }
+}
diff --git a/it0-web-admin/src/presentation/components/layout/sidebar.tsx b/it0-web-admin/src/presentation/components/layout/sidebar.tsx
index e1d3436..4dadf8e 100644
--- a/it0-web-admin/src/presentation/components/layout/sidebar.tsx
+++ b/it0-web-admin/src/presentation/components/layout/sidebar.tsx
@@ -1,8 +1,9 @@
 'use client';
 
-import { useState, createContext, useContext } from 'react';
+import { useState, useMemo, createContext, useContext } from 'react';
 import Link from 'next/link';
 import { usePathname } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { cn } from '@/lib/utils';
 import {
   LayoutDashboard,
@@ -17,6 +18,7 @@ import {
   MessageSquare,
   Building2,
   Settings,
+  Users,
   ChevronRight,
   PanelLeftClose,
   PanelLeft,
@@ -39,6 +41,7 @@ export const useSidebar = () => useContext(SidebarContext);
 /* ---------- Nav config ---------- */
 
 interface NavItem {
+  key: string;
   label: string;
   href: string;
   icon: React.ReactNode;
@@ -47,63 +50,6 @@ interface NavItem {
 
 const iconClass = 'h-4 w-4 shrink-0';
 
-const navItems: NavItem[] = [
-  { label: 'Dashboard', href: '/dashboard', icon: <LayoutDashboard className={iconClass} /> },
-  {
-    label: 'Agent Config',
-    href: '/agent-config',
-    icon: <Bot className={iconClass} />,
-    children: [
-      { label: 'Engine & Prompt', href: '/agent-config' },
-      { label: 'SDK Config', href: '/agent-config/sdk' },
-      { label: 'Skills', href: '/agent-config/skills' },
-      { label: 'Hooks', href: '/agent-config/hooks' },
-    ],
-  },
-  { label: 'Runbooks', href: '/runbooks', icon: <BookOpen className={iconClass} /> },
-  { label: 'Standing Orders', href: '/standing-orders', icon: <ClipboardList className={iconClass} /> },
-  {
-    label: 'Servers',
-    href: '/servers',
-    icon: <Server className={iconClass} />,
-    children: [
-      { label: 'All Servers', href: '/servers' },
-      { label: 'Clusters', href: '/servers/clusters' },
-    ],
-  },
-  {
-    label: 'Monitoring',
-    href: '/monitoring/alert-rules',
-    icon: <Activity className={iconClass} />,
-    children: [
-      { label: 'Alert Rules', href: '/monitoring/alert-rules' },
-      { label: 'Health Checks', href: '/monitoring/health-checks' },
-    ],
-  },
-  { label: 'Terminal', href: '/terminal', icon: <Terminal className={iconClass} /> },
-  {
-    label: 'Security',
-    href: '/security/risk-rules',
-    icon: <Shield className={iconClass} />,
-    children: [
-      { label: 'Risk Rules', href: '/security/risk-rules' },
-      { label: 'Credentials', href: '/security/credentials' },
-    ],
-  },
-  {
-    label: 'Audit',
-    href: '/audit/logs',
-    icon: <FileSearch className={iconClass} />,
-    children: [
-      { label: 'Logs', href: '/audit/logs' },
-      { label: 'Session Replay', href: '/audit/replay' },
-    ],
-  },
-  { label: 'Communication', href: '/communication', icon: <MessageSquare className={iconClass} /> },
-  { label: 'Tenants', href: '/tenants', icon: <Building2 className={iconClass} /> },
-  { label: 'Settings', href: '/settings', icon: <Settings className={iconClass} /> },
-];
-
 /* ---------- Helpers ---------- */
 
 function isActive(pathname: string, href: string) {
@@ -137,11 +83,78 @@ function Tooltip({ children, label }: { children: React.ReactNode; label: string
 
 export function Sidebar() {
   const pathname = usePathname();
+  const { t } = useTranslation('sidebar');
   const [expanded, setExpanded] = useState<Record<string, boolean>>({});
   const [collapsed, setCollapsed] = useState(false);
 
-  const toggle = (label: string) =>
-    setExpanded((prev) => ({ ...prev, [label]: !prev[label] }));
+  const navItems: NavItem[] = useMemo(() => [
+    { key: 'dashboard', label: t('dashboard'), href: '/dashboard', icon: <LayoutDashboard className={iconClass} /> },
+    {
+      key: 'agentConfig',
+      label: t('agentConfig'),
+      href: '/agent-config',
+      icon: <Bot className={iconClass} />,
+      children: [
+        { label: t('enginePrompt'), href: '/agent-config' },
+        { label: t('sdkConfig'), href: '/agent-config/sdk' },
+        { label: t('skills'), href: '/agent-config/skills' },
+        { label: t('hooks'), href: '/agent-config/hooks' },
+      ],
+    },
+    { key: 'runbooks', label: t('runbooks'), href: '/runbooks', icon: <BookOpen className={iconClass} /> },
+    { key: 'standingOrders', label: t('standingOrders'), href: '/standing-orders', icon: <ClipboardList className={iconClass} /> },
+    {
+      key: 'servers',
+      label: t('servers'),
+      href: '/servers',
+      icon: <Server className={iconClass} />,
+      children: [
+        { label: t('allServers'), href: '/servers' },
+        { label: t('clusters'), href: '/servers/clusters' },
+      ],
+    },
+    {
+      key: 'monitoring',
+      label: t('monitoring'),
+      href: '/monitoring/alert-rules',
+      icon: <Activity className={iconClass} />,
+      children: [
+        { label: t('alertRules'), href: '/monitoring/alert-rules' },
+        { label: t('healthChecks'), href: '/monitoring/health-checks' },
+        { label: t('metrics'), href: '/monitoring/metrics' },
+      ],
+    },
+    { key: 'terminal', label: t('terminal'), href: '/terminal', icon: <Terminal className={iconClass} /> },
+    {
+      key: 'security',
+      label: t('security'),
+      href: '/security/risk-rules',
+      icon: <Shield className={iconClass} />,
+      children: [
+        { label: t('riskRules'), href: '/security/risk-rules' },
+        { label: t('credentials'), href: '/security/credentials' },
+        { label: t('roles'), href: '/security/roles' },
+        { label: t('permissions'), href: '/security/permissions' },
+      ],
+    },
+    {
+      key: 'audit',
+      label: t('audit'),
+      href: '/audit/logs',
+      icon: <FileSearch className={iconClass} />,
+      children: [
+        { label: t('logs'), href: '/audit/logs' },
+        { label: t('sessionReplay'), href: '/audit/replay' },
+      ],
+    },
+    { key: 'communication', label: t('communication'), href: '/communication', icon: <MessageSquare className={iconClass} /> },
+    { key: 'tenants', label: t('tenants'), href: '/tenants', icon: <Building2 className={iconClass} /> },
+    { key: 'users', label: t('users'), href: '/users', icon: <Users className={iconClass} /> },
+    { key: 'settings', label: t('settings'), href: '/settings', icon: <Settings className={iconClass} /> },
+  ], [t]);
+
+  const toggle = (key: string) =>
+    setExpanded((prev) => ({ ...prev, [key]: !prev[key] }));
 
   return (
     <SidebarContext.Provider value={{ collapsed, setCollapsed }}>
@@ -159,8 +172,8 @@ export function Sidebar() {
             </div>
             {!collapsed && (
               <div className="min-w-0">
-                <h1 className="text-sm font-semibold tracking-tight truncate">IT0 Admin</h1>
-                <p className="text-[10px] text-muted-foreground leading-none mt-0.5">Operations Console</p>
+                <h1 className="text-sm font-semibold tracking-tight truncate">{t('appName')}</h1>
+                <p className="text-[10px] text-muted-foreground leading-none mt-0.5">{t('appSubtitle')}</p>
               </div>
             )}
           </div>
@@ -171,7 +184,7 @@ export function Sidebar() {
           {navItems.map((item) => {
             const hasChildren = item.children && item.children.length > 0;
             const groupActive = isGroupActive(pathname, item);
-            const isOpen = expanded[item.label] ?? groupActive;
+            const isOpen = expanded[item.key] ?? groupActive;
 
             /* ---- Collapsed: icon-only with tooltip ---- */
             if (collapsed) {
@@ -179,7 +192,7 @@ export function Sidebar() {
                 ? item.children![0].href
                 : item.href;
               return (
-                <Tooltip key={item.label} label={item.label}>
+                <Tooltip key={item.key} label={item.label}>
                   <Link
                     href={linkTarget}
                     className={cn(
@@ -199,7 +212,7 @@ export function Sidebar() {
             if (!hasChildren) {
               return (
                 <Link
-                  key={item.href}
+                  key={item.key}
                   href={item.href}
                   className={cn(
                     'flex items-center gap-2.5 px-2.5 py-2 rounded-md text-[13px] transition-colors',
@@ -216,9 +229,9 @@ export function Sidebar() {
 
             /* ---- Expanded: with children ---- */
             return (
-              <div key={item.label}>
+              <div key={item.key}>
                 <button
-                  onClick={() => toggle(item.label)}
+                  onClick={() => toggle(item.key)}
                   className={cn(
                     'flex items-center gap-2.5 w-full px-2.5 py-2 rounded-md text-[13px] transition-colors',
                     groupActive
@@ -273,7 +286,7 @@ export function Sidebar() {
             ) : (
               <>
                 <PanelLeftClose className="h-4 w-4 shrink-0" />
-                <span>Collapse</span>
+                <span>{t('collapse')}</span>
               </>
             )}
           </button>
diff --git a/it0-web-admin/src/presentation/components/layout/top-bar.tsx b/it0-web-admin/src/presentation/components/layout/top-bar.tsx
index 0f0dcf3..9e47ff5 100644
--- a/it0-web-admin/src/presentation/components/layout/top-bar.tsx
+++ b/it0-web-admin/src/presentation/components/layout/top-bar.tsx
@@ -2,6 +2,7 @@
 
 import { useState, useEffect, useRef } from 'react';
 import { useRouter } from 'next/navigation';
+import { useTranslation } from 'react-i18next';
 import { useTenantStore } from '@/stores/zustand/tenant-store';
 import { Search, Bell, LogOut, User, Settings } from 'lucide-react';
 
@@ -14,6 +15,7 @@ interface StoredUser {
 
 export function TopBar() {
   const router = useRouter();
+  const { t } = useTranslation('topbar');
   const { currentTenant } = useTenantStore();
   const [menuOpen, setMenuOpen] = useState(false);
   const [user, setUser] = useState<StoredUser | null>(null);
@@ -61,9 +63,9 @@ export function TopBar() {
         }}
       >
         <Search className="h-3.5 w-3.5 shrink-0" />
-        <span className="flex-1 text-left">Search...</span>
+        <span className="flex-1 text-left">{t('search')}</span>
         <kbd className="text-[10px] bg-muted/60 px-1.5 py-0.5 rounded border border-border/40 font-mono">
-          ⌘K
+          {t('shortcutKey')}
         </kbd>
       </button>
 
@@ -79,8 +81,8 @@ export function TopBar() {
 
         {/* Tenant indicator */}
         <div className="text-xs">
-          <span className="text-muted-foreground">Tenant: </span>
-          <span className="font-medium">{currentTenant?.name || currentTenant?.id || 'Not selected'}</span>
+          <span className="text-muted-foreground">{t('tenant')} </span>
+          <span className="font-medium">{currentTenant?.name || currentTenant?.id || t('notSelected')}</span>
         </div>
 
         {/* User avatar + dropdown */}
@@ -96,7 +98,7 @@ export function TopBar() {
             <div className="absolute right-0 top-full mt-1.5 w-56 bg-card border rounded-lg shadow-lg py-1 z-50">
               {/* User info */}
               <div className="px-3 py-2 border-b">
-                <p className="text-sm font-medium truncate">{user?.name || 'User'}</p>
+                <p className="text-sm font-medium truncate">{user?.name || t('defaultUser')}</p>
                 <p className="text-xs text-muted-foreground truncate">{user?.email}</p>
               </div>
 
@@ -106,14 +108,14 @@ export function TopBar() {
                 className="w-full flex items-center gap-2 px-3 py-2 text-sm text-muted-foreground hover:text-foreground hover:bg-accent transition-colors"
               >
                 <Settings className="h-3.5 w-3.5" />
-                Settings
+                {t('settings')}
               </button>
               <button
                 onClick={() => { setMenuOpen(false); router.push('/users'); }}
                 className="w-full flex items-center gap-2 px-3 py-2 text-sm text-muted-foreground hover:text-foreground hover:bg-accent transition-colors"
               >
                 <User className="h-3.5 w-3.5" />
-                Users
+                {t('users')}
               </button>
 
               <div className="border-t my-1" />
@@ -123,7 +125,7 @@ export function TopBar() {
                 className="w-full flex items-center gap-2 px-3 py-2 text-sm text-red-500 hover:bg-red-500/10 transition-colors"
               >
                 <LogOut className="h-3.5 w-3.5" />
-                Sign out
+                {t('signOut')}
               </button>
             </div>
           )}
diff --git a/it0-web-admin/src/stores/zustand/locale-store.ts b/it0-web-admin/src/stores/zustand/locale-store.ts
new file mode 100644
index 0000000..d7feea2
--- /dev/null
+++ b/it0-web-admin/src/stores/zustand/locale-store.ts
@@ -0,0 +1,39 @@
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+export type SupportedLocale = 'en' | 'zh';
+
+interface LocaleState {
+  locale: SupportedLocale;
+  setLocale: (locale: SupportedLocale) => void;
+}
+
+export const useLocaleStore = create<LocaleState>()(
+  persist(
+    (set) => ({
+      locale: 'en',
+      setLocale: (locale) => {
+        import('@/i18n/config').then(({ default: i18n }) => {
+          i18n.changeLanguage(locale);
+        });
+        if (typeof document !== 'undefined') {
+          document.documentElement.lang = locale;
+        }
+        set({ locale });
+      },
+    }),
+    { name: 'it0-locale' },
+  ),
+);
+
+// Sync i18next with persisted locale on app load.
+// Called once from providers.tsx after i18n/config is initialized.
+export function syncLocaleOnLoad() {
+  const { locale } = useLocaleStore.getState();
+  if (locale && typeof document !== 'undefined') {
+    import('@/i18n/config').then(({ default: i18n }) => {
+      i18n.changeLanguage(locale);
+    });
+    document.documentElement.lang = locale;
+  }
+}