diff --git a/packages/cli/src/ui/AppContainer.tsx b/packages/cli/src/ui/AppContainer.tsx
index fbfc732b..2d0d9b37 100644
--- a/packages/cli/src/ui/AppContainer.tsx
+++ b/packages/cli/src/ui/AppContainer.tsx
@@ -91,6 +91,7 @@ import { useGitBranchName } from './hooks/useGitBranchName.js';
 import { useExtensionUpdates } from './hooks/useExtensionUpdates.js';
 import { ShellFocusContext } from './contexts/ShellFocusContext.js';
 import { useQuitConfirmation } from './hooks/useQuitConfirmation.js';
+import { t } from '../i18n/index.js';
 import { useWelcomeBack } from './hooks/useWelcomeBack.js';
 import { useDialogClose } from './hooks/useDialogClose.js';
 import { type VisionSwitchOutcome } from './components/ModelSwitchDialog.js';
@@ -372,14 +373,14 @@ export const AppContainer = (props: AppContainerProps) => {
 
   // Handle Qwen OAuth timeout
   const handleQwenAuthTimeout = useCallback(() => {
-    onAuthError('Qwen OAuth authentication timed out. Please try again.');
+    onAuthError(t('Qwen OAuth authentication timed out. Please try again.'));
     cancelQwenAuth();
     setAuthState(AuthState.Updating);
   }, [onAuthError, cancelQwenAuth, setAuthState]);
 
   // Handle Qwen OAuth cancel
   const handleQwenAuthCancel = useCallback(() => {
-    onAuthError('Qwen OAuth authentication cancelled.');
+    onAuthError(t('Qwen OAuth authentication cancelled.'));
     cancelQwenAuth();
     setAuthState(AuthState.Updating);
   }, [onAuthError, cancelQwenAuth, setAuthState]);
@@ -401,7 +402,13 @@ export const AppContainer = (props: AppContainerProps) => {
         settings.merged.security?.auth.selectedType
     ) {
       onAuthError(
-        `Authentication is enforced to be ${settings.merged.security?.auth.enforcedType}, but you are currently using ${settings.merged.security?.auth.selectedType}.`,
+        t(
+          'Authentication is enforced to be {{enforcedType}}, but you are currently using {{currentType}}.',
+          {
+            enforcedType: settings.merged.security?.auth.enforcedType,
+            currentType: settings.merged.security?.auth.selectedType,
+          },
+        ),
       );
     } else if (
       settings.merged.security?.auth?.selectedType &&
diff --git a/packages/cli/src/ui/auth/AuthDialog.tsx b/packages/cli/src/ui/auth/AuthDialog.tsx
index 9d9baa89..61463bc0 100644
--- a/packages/cli/src/ui/auth/AuthDialog.tsx
+++ b/packages/cli/src/ui/auth/AuthDialog.tsx
@@ -14,6 +14,7 @@ import { Colors } from '../colors.js';
 import { useKeypress } from '../hooks/useKeypress.js';
 import { OpenAIKeyPrompt } from '../components/OpenAIKeyPrompt.js';
 import { RadioButtonSelect } from '../components/shared/RadioButtonSelect.js';
+import { t } from '../../i18n/index.js';
 
 interface AuthDialogProps {
   onSelect: (
@@ -53,10 +54,14 @@ export function AuthDialog({
   const items = [
     {
       key: AuthType.QWEN_OAUTH,
-      label: 'Qwen OAuth',
+      label: t('Qwen OAuth'),
       value: AuthType.QWEN_OAUTH,
     },
-    { key: AuthType.USE_OPENAI, label: 'OpenAI', value: AuthType.USE_OPENAI },
+    {
+      key: AuthType.USE_OPENAI,
+      label: t('OpenAI'),
+      value: AuthType.USE_OPENAI,
+    },
   ];
 
   const initialAuthIndex = Math.max(
@@ -107,7 +112,9 @@ export function AuthDialog({
 
   const handleOpenAIKeyCancel = () => {
     setShowOpenAIKeyPrompt(false);
-    setErrorMessage('OpenAI API key is required to use OpenAI authentication.');
+    setErrorMessage(
+      t('OpenAI API key is required to use OpenAI authentication.'),
+    );
   };
 
   useKeypress(
@@ -125,7 +132,9 @@ export function AuthDialog({
         if (settings.merged.security?.auth?.selectedType === undefined) {
           // Prevent exiting if no auth method is set
           setErrorMessage(
-            'You must select an auth method to proceed. Press Ctrl+C again to exit.',
+            t(
+              'You must select an auth method to proceed. Press Ctrl+C again to exit.',
+            ),
           );
           return;
         }
@@ -165,9 +174,9 @@ export function AuthDialog({
       padding={1}
       width="100%"
     >
-      <Text bold>Get started</Text>
+      <Text bold>{t('Get started')}</Text>
       <Box marginTop={1}>
-        <Text>How would you like to authenticate for this project?</Text>
+        <Text>{t('How would you like to authenticate for this project?')}</Text>
       </Box>
       <Box marginTop={1}>
         <RadioButtonSelect
@@ -182,10 +191,10 @@ export function AuthDialog({
         </Box>
       )}
       <Box marginTop={1}>
-        <Text color={Colors.AccentPurple}>(Use Enter to Set Auth)</Text>
+        <Text color={Colors.AccentPurple}>{t('(Use Enter to Set Auth)')}</Text>
       </Box>
       <Box marginTop={1}>
-        <Text>Terms of Services and Privacy Notice for Qwen Code</Text>
+        <Text>{t('Terms of Services and Privacy Notice for Qwen Code')}</Text>
       </Box>
       <Box marginTop={1}>
         <Text color={Colors.AccentBlue}>
diff --git a/packages/cli/src/ui/auth/useAuth.ts b/packages/cli/src/ui/auth/useAuth.ts
index e761043d..34e484b4 100644
--- a/packages/cli/src/ui/auth/useAuth.ts
+++ b/packages/cli/src/ui/auth/useAuth.ts
@@ -13,6 +13,7 @@ import {
 } from '@qwen-code/qwen-code-core';
 import { AuthState } from '../types.js';
 import { validateAuthMethod } from '../../config/auth.js';
+import { t } from '../../i18n/index.js';
 
 export function validateAuthMethodWithSettings(
   authType: AuthType,
@@ -20,7 +21,13 @@ export function validateAuthMethodWithSettings(
 ): string | null {
   const enforcedType = settings.merged.security?.auth?.enforcedType;
   if (enforcedType && enforcedType !== authType) {
-    return `Authentication is enforced to be ${enforcedType}, but you are currently using ${authType}.`;
+    return t(
+      'Authentication is enforced to be {{enforcedType}}, but you are currently using {{currentType}}.',
+      {
+        enforcedType,
+        currentType: authType,
+      },
+    );
   }
   if (settings.merged.security?.auth?.useExternal) {
     return null;
@@ -76,7 +83,11 @@ export const useAuthCommand = (settings: LoadedSettings, config: Config) => {
         setAuthError(null);
         setAuthState(AuthState.Authenticated);
       } catch (e) {
-        onAuthError(`Failed to login. Message: ${getErrorMessage(e)}`);
+        onAuthError(
+          t('Failed to login. Message: {{message}}', {
+            message: getErrorMessage(e),
+          }),
+        );
       } finally {
         setIsAuthenticating(false);
       }
diff --git a/packages/cli/src/ui/commands/aboutCommand.ts b/packages/cli/src/ui/commands/aboutCommand.ts
index 0f35db92..800b2b00 100644
--- a/packages/cli/src/ui/commands/aboutCommand.ts
+++ b/packages/cli/src/ui/commands/aboutCommand.ts
@@ -8,10 +8,13 @@ import type { SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
 import { MessageType, type HistoryItemAbout } from '../types.js';
 import { getExtendedSystemInfo } from '../../utils/systemInfo.js';
+import { t } from '../../i18n/index.js';
 
 export const aboutCommand: SlashCommand = {
   name: 'about',
-  description: 'show version info',
+  get description() {
+    return t('show version info');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context) => {
     const systemInfo = await getExtendedSystemInfo(context);
diff --git a/packages/cli/src/ui/commands/agentsCommand.ts b/packages/cli/src/ui/commands/agentsCommand.ts
index ccb5997a..02fed007 100644
--- a/packages/cli/src/ui/commands/agentsCommand.ts
+++ b/packages/cli/src/ui/commands/agentsCommand.ts
@@ -9,15 +9,20 @@ import {
   type SlashCommand,
   type OpenDialogActionReturn,
 } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const agentsCommand: SlashCommand = {
   name: 'agents',
-  description: 'Manage subagents for specialized task delegation.',
+  get description() {
+    return t('Manage subagents for specialized task delegation.');
+  },
   kind: CommandKind.BUILT_IN,
   subCommands: [
     {
       name: 'manage',
-      description: 'Manage existing subagents (view, edit, delete).',
+      get description() {
+        return t('Manage existing subagents (view, edit, delete).');
+      },
       kind: CommandKind.BUILT_IN,
       action: (): OpenDialogActionReturn => ({
         type: 'dialog',
@@ -26,7 +31,9 @@ export const agentsCommand: SlashCommand = {
     },
     {
       name: 'create',
-      description: 'Create a new subagent with guided setup.',
+      get description() {
+        return t('Create a new subagent with guided setup.');
+      },
       kind: CommandKind.BUILT_IN,
       action: (): OpenDialogActionReturn => ({
         type: 'dialog',
diff --git a/packages/cli/src/ui/commands/authCommand.ts b/packages/cli/src/ui/commands/authCommand.ts
index 5ba3088c..9caee464 100644
--- a/packages/cli/src/ui/commands/authCommand.ts
+++ b/packages/cli/src/ui/commands/authCommand.ts
@@ -6,10 +6,13 @@
 
 import type { OpenDialogActionReturn, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const authCommand: SlashCommand = {
   name: 'auth',
-  description: 'change the auth method',
+  get description() {
+    return t('change the auth method');
+  },
   kind: CommandKind.BUILT_IN,
   action: (_context, _args): OpenDialogActionReturn => ({
     type: 'dialog',
diff --git a/packages/cli/src/ui/commands/bugCommand.ts b/packages/cli/src/ui/commands/bugCommand.ts
index 869024b5..14cf3759 100644
--- a/packages/cli/src/ui/commands/bugCommand.ts
+++ b/packages/cli/src/ui/commands/bugCommand.ts
@@ -16,10 +16,13 @@ import {
   getSystemInfoFields,
   getFieldValue,
 } from '../../utils/systemInfoFields.js';
+import { t } from '../../i18n/index.js';
 
 export const bugCommand: SlashCommand = {
   name: 'bug',
-  description: 'submit a bug report',
+  get description() {
+    return t('submit a bug report');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context: CommandContext, args?: string): Promise<void> => {
     const bugDescription = (args || '').trim();
diff --git a/packages/cli/src/ui/commands/clearCommand.ts b/packages/cli/src/ui/commands/clearCommand.ts
index 4c6405c0..8beed859 100644
--- a/packages/cli/src/ui/commands/clearCommand.ts
+++ b/packages/cli/src/ui/commands/clearCommand.ts
@@ -7,21 +7,24 @@
 import { uiTelemetryService } from '@qwen-code/qwen-code-core';
 import type { SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const clearCommand: SlashCommand = {
   name: 'clear',
-  description: 'clear the screen and conversation history',
+  get description() {
+    return t('clear the screen and conversation history');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context, _args) => {
     const geminiClient = context.services.config?.getGeminiClient();
 
     if (geminiClient) {
-      context.ui.setDebugMessage('Clearing terminal and resetting chat.');
+      context.ui.setDebugMessage(t('Clearing terminal and resetting chat.'));
       // If resetChat fails, the exception will propagate and halt the command,
       // which is the correct behavior to signal a failure to the user.
       await geminiClient.resetChat();
     } else {
-      context.ui.setDebugMessage('Clearing terminal.');
+      context.ui.setDebugMessage(t('Clearing terminal.'));
     }
 
     uiTelemetryService.setLastPromptTokenCount(0);
diff --git a/packages/cli/src/ui/commands/compressCommand.ts b/packages/cli/src/ui/commands/compressCommand.ts
index 45dc6a46..399bfa61 100644
--- a/packages/cli/src/ui/commands/compressCommand.ts
+++ b/packages/cli/src/ui/commands/compressCommand.ts
@@ -8,11 +8,14 @@ import type { HistoryItemCompression } from '../types.js';
 import { MessageType } from '../types.js';
 import type { SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const compressCommand: SlashCommand = {
   name: 'compress',
   altNames: ['summarize'],
-  description: 'Compresses the context by replacing it with a summary.',
+  get description() {
+    return t('Compresses the context by replacing it with a summary.');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context) => {
     const { ui } = context;
@@ -20,7 +23,7 @@ export const compressCommand: SlashCommand = {
       ui.addItem(
         {
           type: MessageType.ERROR,
-          text: 'Already compressing, wait for previous request to complete',
+          text: t('Already compressing, wait for previous request to complete'),
         },
         Date.now(),
       );
@@ -60,7 +63,7 @@ export const compressCommand: SlashCommand = {
         ui.addItem(
           {
             type: MessageType.ERROR,
-            text: 'Failed to compress chat history.',
+            text: t('Failed to compress chat history.'),
           },
           Date.now(),
         );
@@ -69,9 +72,9 @@ export const compressCommand: SlashCommand = {
       ui.addItem(
         {
           type: MessageType.ERROR,
-          text: `Failed to compress chat history: ${
-            e instanceof Error ? e.message : String(e)
-          }`,
+          text: t('Failed to compress chat history: {{error}}', {
+            error: e instanceof Error ? e.message : String(e),
+          }),
         },
         Date.now(),
       );
diff --git a/packages/cli/src/ui/commands/copyCommand.ts b/packages/cli/src/ui/commands/copyCommand.ts
index 99115491..3b79dd48 100644
--- a/packages/cli/src/ui/commands/copyCommand.ts
+++ b/packages/cli/src/ui/commands/copyCommand.ts
@@ -7,10 +7,13 @@
 import { copyToClipboard } from '../utils/commandUtils.js';
 import type { SlashCommand, SlashCommandActionReturn } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const copyCommand: SlashCommand = {
   name: 'copy',
-  description: 'Copy the last result or code snippet to clipboard',
+  get description() {
+    return t('Copy the last result or code snippet to clipboard');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context, _args): Promise<SlashCommandActionReturn | void> => {
     const chat = await context.services.config?.getGeminiClient()?.getChat();
diff --git a/packages/cli/src/ui/commands/directoryCommand.tsx b/packages/cli/src/ui/commands/directoryCommand.tsx
index cc8970d0..60dfcd3b 100644
--- a/packages/cli/src/ui/commands/directoryCommand.tsx
+++ b/packages/cli/src/ui/commands/directoryCommand.tsx
@@ -10,6 +10,7 @@ import { MessageType } from '../types.js';
 import * as os from 'node:os';
 import * as path from 'node:path';
 import { loadServerHierarchicalMemory } from '@qwen-code/qwen-code-core';
+import { t } from '../../i18n/index.js';
 
 export function expandHomeDir(p: string): string {
   if (!p) {
@@ -27,13 +28,18 @@ export function expandHomeDir(p: string): string {
 export const directoryCommand: SlashCommand = {
   name: 'directory',
   altNames: ['dir'],
-  description: 'Manage workspace directories',
+  get description() {
+    return t('Manage workspace directories');
+  },
   kind: CommandKind.BUILT_IN,
   subCommands: [
     {
       name: 'add',
-      description:
-        'Add directories to the workspace. Use comma to separate multiple paths',
+      get description() {
+        return t(
+          'Add directories to the workspace. Use comma to separate multiple paths',
+        );
+      },
       kind: CommandKind.BUILT_IN,
       action: async (context: CommandContext, args: string) => {
         const {
@@ -150,7 +156,9 @@ export const directoryCommand: SlashCommand = {
     },
     {
       name: 'show',
-      description: 'Show all directories in the workspace',
+      get description() {
+        return t('Show all directories in the workspace');
+      },
       kind: CommandKind.BUILT_IN,
       action: async (context: CommandContext) => {
         const {
diff --git a/packages/cli/src/ui/commands/docsCommand.ts b/packages/cli/src/ui/commands/docsCommand.ts
index 109aaab7..8fc01836 100644
--- a/packages/cli/src/ui/commands/docsCommand.ts
+++ b/packages/cli/src/ui/commands/docsCommand.ts
@@ -12,19 +12,28 @@ import {
   CommandKind,
 } from './types.js';
 import { MessageType } from '../types.js';
+import { t, getCurrentLanguage } from '../../i18n/index.js';
 
 export const docsCommand: SlashCommand = {
   name: 'docs',
-  description: 'open full Qwen Code documentation in your browser',
+  get description() {
+    return t('open full Qwen Code documentation in your browser');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context: CommandContext): Promise<void> => {
-    const docsUrl = 'https://qwenlm.github.io/qwen-code-docs/en';
+    const langPath = getCurrentLanguage()?.startsWith('zh') ? 'zh' : 'en';
+    const docsUrl = `https://qwenlm.github.io/qwen-code-docs/${langPath}`;
 
     if (process.env['SANDBOX'] && process.env['SANDBOX'] !== 'sandbox-exec') {
       context.ui.addItem(
         {
           type: MessageType.INFO,
-          text: `Please open the following URL in your browser to view the documentation:\n${docsUrl}`,
+          text: t(
+            'Please open the following URL in your browser to view the documentation:\n{{url}}',
+            {
+              url: docsUrl,
+            },
+          ),
         },
         Date.now(),
       );
@@ -32,7 +41,9 @@ export const docsCommand: SlashCommand = {
       context.ui.addItem(
         {
           type: MessageType.INFO,
-          text: `Opening documentation in your browser: ${docsUrl}`,
+          text: t('Opening documentation in your browser: {{url}}', {
+            url: docsUrl,
+          }),
         },
         Date.now(),
       );
diff --git a/packages/cli/src/ui/commands/editorCommand.ts b/packages/cli/src/ui/commands/editorCommand.ts
index 5b5c4c5d..f39cbdbc 100644
--- a/packages/cli/src/ui/commands/editorCommand.ts
+++ b/packages/cli/src/ui/commands/editorCommand.ts
@@ -9,10 +9,13 @@ import {
   type OpenDialogActionReturn,
   type SlashCommand,
 } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const editorCommand: SlashCommand = {
   name: 'editor',
-  description: 'set external editor preference',
+  get description() {
+    return t('set external editor preference');
+  },
   kind: CommandKind.BUILT_IN,
   action: (): OpenDialogActionReturn => ({
     type: 'dialog',
diff --git a/packages/cli/src/ui/commands/helpCommand.ts b/packages/cli/src/ui/commands/helpCommand.ts
index 4731efc5..c4772ea0 100644
--- a/packages/cli/src/ui/commands/helpCommand.ts
+++ b/packages/cli/src/ui/commands/helpCommand.ts
@@ -7,12 +7,15 @@
 import type { SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
 import { MessageType, type HistoryItemHelp } from '../types.js';
+import { t } from '../../i18n/index.js';
 
 export const helpCommand: SlashCommand = {
   name: 'help',
   altNames: ['?'],
   kind: CommandKind.BUILT_IN,
-  description: 'for help on Qwen Code',
+  get description() {
+    return t('for help on Qwen Code');
+  },
   action: async (context) => {
     const helpItem: Omit<HistoryItemHelp, 'id'> = {
       type: MessageType.HELP,
diff --git a/packages/cli/src/ui/commands/initCommand.ts b/packages/cli/src/ui/commands/initCommand.ts
index 0777be8e..16c98dff 100644
--- a/packages/cli/src/ui/commands/initCommand.ts
+++ b/packages/cli/src/ui/commands/initCommand.ts
@@ -15,10 +15,13 @@ import { getCurrentGeminiMdFilename } from '@qwen-code/qwen-code-core';
 import { CommandKind } from './types.js';
 import { Text } from 'ink';
 import React from 'react';
+import { t } from '../../i18n/index.js';
 
 export const initCommand: SlashCommand = {
   name: 'init',
-  description: 'Analyzes the project and creates a tailored QWEN.md file.',
+  get description() {
+    return t('Analyzes the project and creates a tailored QWEN.md file.');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (
     context: CommandContext,
@@ -28,7 +31,7 @@ export const initCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'Configuration not available.',
+        content: t('Configuration not available.'),
       };
     }
     const targetDir = context.services.config.getTargetDir();
diff --git a/packages/cli/src/ui/commands/languageCommand.ts b/packages/cli/src/ui/commands/languageCommand.ts
index aabaa2ec..eee70b98 100644
--- a/packages/cli/src/ui/commands/languageCommand.ts
+++ b/packages/cli/src/ui/commands/languageCommand.ts
@@ -115,10 +115,18 @@ async function setUiLanguage(
   // Reload commands to update their descriptions with the new language
   context.ui.reloadCommands();
 
+  // Map language codes to friendly display names
+  const langDisplayNames: Record<SupportedLanguage, string> = {
+    zh: '中文（zh-CN）',
+    en: 'English（en-US）',
+  };
+
   return {
     type: 'message',
     messageType: 'info',
-    content: t('UI language changed to {{lang}}', { lang }),
+    content: t('UI language changed to {{lang}}', {
+      lang: langDisplayNames[lang],
+    }),
   };
 }
 
diff --git a/packages/cli/src/ui/commands/mcpCommand.ts b/packages/cli/src/ui/commands/mcpCommand.ts
index 2521e10c..f0e66829 100644
--- a/packages/cli/src/ui/commands/mcpCommand.ts
+++ b/packages/cli/src/ui/commands/mcpCommand.ts
@@ -24,10 +24,13 @@ import {
 } from '@qwen-code/qwen-code-core';
 import { appEvents, AppEvent } from '../../utils/events.js';
 import { MessageType, type HistoryItemMcpStatus } from '../types.js';
+import { t } from '../../i18n/index.js';
 
 const authCommand: SlashCommand = {
   name: 'auth',
-  description: 'Authenticate with an OAuth-enabled MCP server',
+  get description() {
+    return t('Authenticate with an OAuth-enabled MCP server');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (
     context: CommandContext,
@@ -40,7 +43,7 @@ const authCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'Config not loaded.',
+        content: t('Config not loaded.'),
       };
     }
 
@@ -56,14 +59,14 @@ const authCommand: SlashCommand = {
         return {
           type: 'message',
           messageType: 'info',
-          content: 'No MCP servers configured with OAuth authentication.',
+          content: t('No MCP servers configured with OAuth authentication.'),
         };
       }
 
       return {
         type: 'message',
         messageType: 'info',
-        content: `MCP servers with OAuth authentication:\n${oauthServers.map((s) => `  - ${s}`).join('\n')}\n\nUse /mcp auth <server-name> to authenticate.`,
+        content: `${t('MCP servers with OAuth authentication:')}\n${oauthServers.map((s) => `  - ${s}`).join('\n')}\n\n${t('Use /mcp auth <server-name> to authenticate.')}`,
       };
     }
 
@@ -72,7 +75,7 @@ const authCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: `MCP server '${serverName}' not found.`,
+        content: t("MCP server '{{name}}' not found.", { name: serverName }),
       };
     }
 
@@ -111,7 +114,12 @@ const authCommand: SlashCommand = {
       context.ui.addItem(
         {
           type: 'info',
-          text: `✅ Successfully authenticated with MCP server '${serverName}'!`,
+          text: t(
+            "Successfully authenticated and refreshed tools for '{{name}}'.",
+            {
+              name: serverName,
+            },
+          ),
         },
         Date.now(),
       );
@@ -122,7 +130,9 @@ const authCommand: SlashCommand = {
         context.ui.addItem(
           {
             type: 'info',
-            text: `Re-discovering tools from '${serverName}'...`,
+            text: t("Re-discovering tools from '{{name}}'...", {
+              name: serverName,
+            }),
           },
           Date.now(),
         );
@@ -140,13 +150,24 @@ const authCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'info',
-        content: `Successfully authenticated and refreshed tools for '${serverName}'.`,
+        content: t(
+          "Successfully authenticated and refreshed tools for '{{name}}'.",
+          {
+            name: serverName,
+          },
+        ),
       };
     } catch (error) {
       return {
         type: 'message',
         messageType: 'error',
-        content: `Failed to authenticate with MCP server '${serverName}': ${getErrorMessage(error)}`,
+        content: t(
+          "Failed to authenticate with MCP server '{{name}}': {{error}}",
+          {
+            name: serverName,
+            error: getErrorMessage(error),
+          },
+        ),
       };
     } finally {
       appEvents.removeListener(AppEvent.OauthDisplayMessage, displayListener);
@@ -165,7 +186,9 @@ const authCommand: SlashCommand = {
 
 const listCommand: SlashCommand = {
   name: 'list',
-  description: 'List configured MCP servers and tools',
+  get description() {
+    return t('List configured MCP servers and tools');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (
     context: CommandContext,
@@ -176,7 +199,7 @@ const listCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'Config not loaded.',
+        content: t('Config not loaded.'),
       };
     }
 
@@ -276,7 +299,9 @@ const listCommand: SlashCommand = {
 
 const refreshCommand: SlashCommand = {
   name: 'refresh',
-  description: 'Restarts MCP servers.',
+  get description() {
+    return t('Restarts MCP servers.');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (
     context: CommandContext,
@@ -286,7 +311,7 @@ const refreshCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'Config not loaded.',
+        content: t('Config not loaded.'),
       };
     }
 
@@ -324,8 +349,11 @@ const refreshCommand: SlashCommand = {
 
 export const mcpCommand: SlashCommand = {
   name: 'mcp',
-  description:
-    'list configured MCP servers and tools, or authenticate with OAuth-enabled servers',
+  get description() {
+    return t(
+      'list configured MCP servers and tools, or authenticate with OAuth-enabled servers',
+    );
+  },
   kind: CommandKind.BUILT_IN,
   subCommands: [listCommand, authCommand, refreshCommand],
   // Default action when no subcommand is provided
diff --git a/packages/cli/src/ui/commands/permissionsCommand.ts b/packages/cli/src/ui/commands/permissionsCommand.ts
index 60ef3884..2b6a7c34 100644
--- a/packages/cli/src/ui/commands/permissionsCommand.ts
+++ b/packages/cli/src/ui/commands/permissionsCommand.ts
@@ -6,10 +6,13 @@
 
 import type { OpenDialogActionReturn, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const permissionsCommand: SlashCommand = {
   name: 'permissions',
-  description: 'Manage folder trust settings',
+  get description() {
+    return t('Manage folder trust settings');
+  },
   kind: CommandKind.BUILT_IN,
   action: (): OpenDialogActionReturn => ({
     type: 'dialog',
diff --git a/packages/cli/src/ui/commands/quitCommand.ts b/packages/cli/src/ui/commands/quitCommand.ts
index 3e175d9c..fc9683c9 100644
--- a/packages/cli/src/ui/commands/quitCommand.ts
+++ b/packages/cli/src/ui/commands/quitCommand.ts
@@ -6,10 +6,13 @@
 
 import { formatDuration } from '../utils/formatters.js';
 import { CommandKind, type SlashCommand } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const quitConfirmCommand: SlashCommand = {
   name: 'quit-confirm',
-  description: 'Show quit confirmation dialog',
+  get description() {
+    return t('Show quit confirmation dialog');
+  },
   kind: CommandKind.BUILT_IN,
   action: (context) => {
     const now = Date.now();
@@ -37,7 +40,9 @@ export const quitConfirmCommand: SlashCommand = {
 export const quitCommand: SlashCommand = {
   name: 'quit',
   altNames: ['exit'],
-  description: 'exit the cli',
+  get description() {
+    return t('exit the cli');
+  },
   kind: CommandKind.BUILT_IN,
   action: (context) => {
     const now = Date.now();
diff --git a/packages/cli/src/ui/commands/settingsCommand.ts b/packages/cli/src/ui/commands/settingsCommand.ts
index 4a3665f1..f7052f19 100644
--- a/packages/cli/src/ui/commands/settingsCommand.ts
+++ b/packages/cli/src/ui/commands/settingsCommand.ts
@@ -6,10 +6,13 @@
 
 import type { OpenDialogActionReturn, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const settingsCommand: SlashCommand = {
   name: 'settings',
-  description: 'View and edit Qwen Code settings',
+  get description() {
+    return t('View and edit Qwen Code settings');
+  },
   kind: CommandKind.BUILT_IN,
   action: (_context, _args): OpenDialogActionReturn => ({
     type: 'dialog',
diff --git a/packages/cli/src/ui/commands/setupGithubCommand.ts b/packages/cli/src/ui/commands/setupGithubCommand.ts
index 46b46cba..378f1101 100644
--- a/packages/cli/src/ui/commands/setupGithubCommand.ts
+++ b/packages/cli/src/ui/commands/setupGithubCommand.ts
@@ -20,6 +20,7 @@ import {
 import type { SlashCommand, SlashCommandActionReturn } from './types.js';
 import { CommandKind } from './types.js';
 import { getUrlOpenCommand } from '../../ui/utils/commandUtils.js';
+import { t } from '../../i18n/index.js';
 
 export const GITHUB_WORKFLOW_PATHS = [
   'gemini-dispatch/gemini-dispatch.yml',
@@ -91,7 +92,9 @@ export async function updateGitignore(gitRepoRoot: string): Promise<void> {
 
 export const setupGithubCommand: SlashCommand = {
   name: 'setup-github',
-  description: 'Set up GitHub Actions',
+  get description() {
+    return t('Set up GitHub Actions');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (
     context: CommandContext,
diff --git a/packages/cli/src/ui/commands/statsCommand.ts b/packages/cli/src/ui/commands/statsCommand.ts
index 1fe628ab..5248ca43 100644
--- a/packages/cli/src/ui/commands/statsCommand.ts
+++ b/packages/cli/src/ui/commands/statsCommand.ts
@@ -12,11 +12,14 @@ import {
   type SlashCommand,
   CommandKind,
 } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const statsCommand: SlashCommand = {
   name: 'stats',
   altNames: ['usage'],
-  description: 'check session stats. Usage: /stats [model|tools]',
+  get description() {
+    return t('check session stats. Usage: /stats [model|tools]');
+  },
   kind: CommandKind.BUILT_IN,
   action: (context: CommandContext) => {
     const now = new Date();
@@ -43,7 +46,9 @@ export const statsCommand: SlashCommand = {
   subCommands: [
     {
       name: 'model',
-      description: 'Show model-specific usage statistics.',
+      get description() {
+        return t('Show model-specific usage statistics.');
+      },
       kind: CommandKind.BUILT_IN,
       action: (context: CommandContext) => {
         context.ui.addItem(
@@ -56,7 +61,9 @@ export const statsCommand: SlashCommand = {
     },
     {
       name: 'tools',
-      description: 'Show tool-specific usage statistics.',
+      get description() {
+        return t('Show tool-specific usage statistics.');
+      },
       kind: CommandKind.BUILT_IN,
       action: (context: CommandContext) => {
         context.ui.addItem(
diff --git a/packages/cli/src/ui/commands/summaryCommand.ts b/packages/cli/src/ui/commands/summaryCommand.ts
index 7c666a04..5d943e8e 100644
--- a/packages/cli/src/ui/commands/summaryCommand.ts
+++ b/packages/cli/src/ui/commands/summaryCommand.ts
@@ -13,11 +13,15 @@ import {
 } from './types.js';
 import { getProjectSummaryPrompt } from '@qwen-code/qwen-code-core';
 import type { HistoryItemSummary } from '../types.js';
+import { t } from '../../i18n/index.js';
 
 export const summaryCommand: SlashCommand = {
   name: 'summary',
-  description:
-    'Generate a project summary and save it to .qwen/PROJECT_SUMMARY.md',
+  get description() {
+    return t(
+      'Generate a project summary and save it to .qwen/PROJECT_SUMMARY.md',
+    );
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context): Promise<SlashCommandActionReturn> => {
     const { config } = context.services;
@@ -26,7 +30,7 @@ export const summaryCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'Config not loaded.',
+        content: t('Config not loaded.'),
       };
     }
 
@@ -35,7 +39,7 @@ export const summaryCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: 'No chat client available to generate summary.',
+        content: t('No chat client available to generate summary.'),
       };
     }
 
@@ -44,15 +48,18 @@ export const summaryCommand: SlashCommand = {
       ui.addItem(
         {
           type: 'error' as const,
-          text: 'Already generating summary, wait for previous request to complete',
+          text: t(
+            'Already generating summary, wait for previous request to complete',
+          ),
         },
         Date.now(),
       );
       return {
         type: 'message',
         messageType: 'error',
-        content:
+        content: t(
           'Already generating summary, wait for previous request to complete',
+        ),
       };
     }
 
@@ -65,7 +72,7 @@ export const summaryCommand: SlashCommand = {
         return {
           type: 'message',
           messageType: 'info',
-          content: 'No conversation found to summarize.',
+          content: t('No conversation found to summarize.'),
         };
       }
 
@@ -171,9 +178,12 @@ export const summaryCommand: SlashCommand = {
       ui.addItem(
         {
           type: 'error' as const,
-          text: `❌ Failed to generate project context summary: ${
-            error instanceof Error ? error.message : String(error)
-          }`,
+          text: `❌ ${t(
+            'Failed to generate project context summary: {{error}}',
+            {
+              error: error instanceof Error ? error.message : String(error),
+            },
+          )}`,
         },
         Date.now(),
       );
@@ -181,9 +191,9 @@ export const summaryCommand: SlashCommand = {
       return {
         type: 'message',
         messageType: 'error',
-        content: `Failed to generate project context summary: ${
-          error instanceof Error ? error.message : String(error)
-        }`,
+        content: t('Failed to generate project context summary: {{error}}', {
+          error: error instanceof Error ? error.message : String(error),
+        }),
       };
     }
   },
diff --git a/packages/cli/src/ui/commands/themeCommand.ts b/packages/cli/src/ui/commands/themeCommand.ts
index 585c84f9..fd366366 100644
--- a/packages/cli/src/ui/commands/themeCommand.ts
+++ b/packages/cli/src/ui/commands/themeCommand.ts
@@ -6,10 +6,13 @@
 
 import type { OpenDialogActionReturn, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const themeCommand: SlashCommand = {
   name: 'theme',
-  description: 'change the theme',
+  get description() {
+    return t('change the theme');
+  },
   kind: CommandKind.BUILT_IN,
   action: (_context, _args): OpenDialogActionReturn => ({
     type: 'dialog',
diff --git a/packages/cli/src/ui/commands/toolsCommand.ts b/packages/cli/src/ui/commands/toolsCommand.ts
index 4378c450..4bd97e3e 100644
--- a/packages/cli/src/ui/commands/toolsCommand.ts
+++ b/packages/cli/src/ui/commands/toolsCommand.ts
@@ -10,10 +10,13 @@ import {
   CommandKind,
 } from './types.js';
 import { MessageType, type HistoryItemToolsList } from '../types.js';
+import { t } from '../../i18n/index.js';
 
 export const toolsCommand: SlashCommand = {
   name: 'tools',
-  description: 'list available Qwen Code tools. Usage: /tools [desc]',
+  get description() {
+    return t('list available Qwen Code tools. Usage: /tools [desc]');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context: CommandContext, args?: string): Promise<void> => {
     const subCommand = args?.trim();
@@ -29,7 +32,7 @@ export const toolsCommand: SlashCommand = {
       context.ui.addItem(
         {
           type: MessageType.ERROR,
-          text: 'Could not retrieve tool registry.',
+          text: t('Could not retrieve tool registry.'),
         },
         Date.now(),
       );
diff --git a/packages/cli/src/ui/commands/vimCommand.ts b/packages/cli/src/ui/commands/vimCommand.ts
index b398cc48..8f3dc6bd 100644
--- a/packages/cli/src/ui/commands/vimCommand.ts
+++ b/packages/cli/src/ui/commands/vimCommand.ts
@@ -6,10 +6,13 @@
 
 import type { SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
+import { t } from '../../i18n/index.js';
 
 export const vimCommand: SlashCommand = {
   name: 'vim',
-  description: 'toggle vim mode on/off',
+  get description() {
+    return t('toggle vim mode on/off');
+  },
   kind: CommandKind.BUILT_IN,
   action: async (context, _args) => {
     const newVimState = await context.ui.toggleVimEnabled();
diff --git a/packages/cli/src/ui/components/Composer.tsx b/packages/cli/src/ui/components/Composer.tsx
index 4e255983..1b51227a 100644
--- a/packages/cli/src/ui/components/Composer.tsx
+++ b/packages/cli/src/ui/components/Composer.tsx
@@ -26,6 +26,7 @@ import { useSettings } from '../contexts/SettingsContext.js';
 import { ApprovalMode } from '@qwen-code/qwen-code-core';
 import { StreamingState } from '../types.js';
 import { ConfigInitDisplay } from '../components/ConfigInitDisplay.js';
+import { t } from '../../i18n/index.js';
 
 export const Composer = () => {
   const config = useConfig();
@@ -86,14 +87,16 @@ export const Composer = () => {
           )}
           {uiState.ctrlCPressedOnce ? (
             <Text color={theme.status.warning}>
-              Press Ctrl+C again to exit.
+              {t('Press Ctrl+C again to exit.')}
             </Text>
           ) : uiState.ctrlDPressedOnce ? (
             <Text color={theme.status.warning}>
-              Press Ctrl+D again to exit.
+              {t('Press Ctrl+D again to exit.')}
             </Text>
           ) : uiState.showEscapePrompt ? (
-            <Text color={theme.text.secondary}>Press Esc again to clear.</Text>
+            <Text color={theme.text.secondary}>
+              {t('Press Esc again to clear.')}
+            </Text>
           ) : (
             !settings.merged.ui?.hideContextSummary && (
               <ContextSummaryDisplay
@@ -151,8 +154,8 @@ export const Composer = () => {
           isEmbeddedShellFocused={uiState.embeddedShellFocused}
           placeholder={
             vimEnabled
-              ? "  Press 'i' for INSERT mode and 'Esc' for NORMAL mode."
-              : '  Type your message or @path/to/file'
+              ? '  ' + t("Press 'i' for INSERT mode and 'Esc' for NORMAL mode.")
+              : '  ' + t('Type your message or @path/to/file')
           }
         />
       )}
diff --git a/packages/cli/src/ui/components/InputPrompt.tsx b/packages/cli/src/ui/components/InputPrompt.tsx
index f33700d8..96926629 100644
--- a/packages/cli/src/ui/components/InputPrompt.tsx
+++ b/packages/cli/src/ui/components/InputPrompt.tsx
@@ -89,7 +89,7 @@ export const InputPrompt: React.FC<InputPromptProps> = ({
   config,
   slashCommands,
   commandContext,
-  placeholder = '  Type your message or @path/to/file',
+  placeholder,
   focus = true,
   inputWidth,
   suggestionsWidth,
diff --git a/packages/cli/src/ui/components/ProQuotaDialog.tsx b/packages/cli/src/ui/components/ProQuotaDialog.tsx
index 0f3c4a55..cc9bd5f8 100644
--- a/packages/cli/src/ui/components/ProQuotaDialog.tsx
+++ b/packages/cli/src/ui/components/ProQuotaDialog.tsx
@@ -8,6 +8,7 @@ import type React from 'react';
 import { Box, Text } from 'ink';
 import { RadioButtonSelect } from './shared/RadioButtonSelect.js';
 import { theme } from '../semantic-colors.js';
+import { t } from '../../i18n/index.js';
 
 interface ProQuotaDialogProps {
   failedModel: string;
@@ -22,12 +23,12 @@ export function ProQuotaDialog({
 }: ProQuotaDialogProps): React.JSX.Element {
   const items = [
     {
-      label: 'Change auth (executes the /auth command)',
+      label: t('Change auth (executes the /auth command)'),
       value: 'auth' as const,
       key: 'auth',
     },
     {
-      label: `Continue with ${fallbackModel}`,
+      label: t('Continue with {{model}}', { model: fallbackModel }),
       value: 'continue' as const,
       key: 'continue',
     },
@@ -40,7 +41,7 @@ export function ProQuotaDialog({
   return (
     <Box borderStyle="round" flexDirection="column" paddingX={1}>
       <Text bold color={theme.status.warning}>
-        Pro quota limit reached for {failedModel}.
+        {t('Pro quota limit reached for {{model}}.', { model: failedModel })}
       </Text>
       <Box marginTop={1}>
         <RadioButtonSelect
diff --git a/packages/cli/src/ui/components/QuitConfirmationDialog.tsx b/packages/cli/src/ui/components/QuitConfirmationDialog.tsx
index ab49f4c5..9e7cd914 100644
--- a/packages/cli/src/ui/components/QuitConfirmationDialog.tsx
+++ b/packages/cli/src/ui/components/QuitConfirmationDialog.tsx
@@ -12,6 +12,7 @@ import {
   type RadioSelectItem,
 } from './shared/RadioButtonSelect.js';
 import { useKeypress } from '../hooks/useKeypress.js';
+import { t } from '../../i18n/index.js';
 
 export enum QuitChoice {
   CANCEL = 'cancel',
@@ -39,22 +40,22 @@ export const QuitConfirmationDialog: React.FC<QuitConfirmationDialogProps> = ({
   const options: Array<RadioSelectItem<QuitChoice>> = [
     {
       key: 'quit',
-      label: 'Quit immediately (/quit)',
+      label: t('Quit immediately (/quit)'),
       value: QuitChoice.QUIT,
     },
     {
       key: 'summary-and-quit',
-      label: 'Generate summary and quit (/summary)',
+      label: t('Generate summary and quit (/summary)'),
       value: QuitChoice.SUMMARY_AND_QUIT,
     },
     {
       key: 'save-and-quit',
-      label: 'Save conversation and quit (/chat save)',
+      label: t('Save conversation and quit (/chat save)'),
       value: QuitChoice.SAVE_AND_QUIT,
     },
     {
       key: 'cancel',
-      label: 'Cancel (stay in application)',
+      label: t('Cancel (stay in application)'),
       value: QuitChoice.CANCEL,
     },
   ];
@@ -69,7 +70,7 @@ export const QuitConfirmationDialog: React.FC<QuitConfirmationDialogProps> = ({
       marginLeft={1}
     >
       <Box flexDirection="column" marginBottom={1}>
-        <Text>What would you like to do before exiting?</Text>
+        <Text>{t('What would you like to do before exiting?')}</Text>
       </Box>
 
       <RadioButtonSelect items={options} onSelect={onSelect} isFocused />
diff --git a/packages/cli/src/ui/components/QwenOAuthProgress.tsx b/packages/cli/src/ui/components/QwenOAuthProgress.tsx
index 685cb107..56cb9933 100644
--- a/packages/cli/src/ui/components/QwenOAuthProgress.tsx
+++ b/packages/cli/src/ui/components/QwenOAuthProgress.tsx
@@ -13,6 +13,7 @@ import qrcode from 'qrcode-terminal';
 import { Colors } from '../colors.js';
 import type { DeviceAuthorizationInfo } from '../hooks/useQwenAuth.js';
 import { useKeypress } from '../hooks/useKeypress.js';
+import { t } from '../../i18n/index.js';
 
 interface QwenOAuthProgressProps {
   onTimeout: () => void;
@@ -52,11 +53,11 @@ function QrCodeDisplay({
       width="100%"
     >
       <Text bold color={Colors.AccentBlue}>
-        Qwen OAuth Authentication
+        {t('Qwen OAuth Authentication')}
       </Text>
 
       <Box marginTop={1}>
-        <Text>Please visit this URL to authorize:</Text>
+        <Text>{t('Please visit this URL to authorize:')}</Text>
       </Box>
 
       <Link url={verificationUrl} fallback={false}>
@@ -66,7 +67,7 @@ function QrCodeDisplay({
       </Link>
 
       <Box marginTop={1}>
-        <Text>Or scan the QR code below:</Text>
+        <Text>{t('Or scan the QR code below:')}</Text>
       </Box>
 
       <Box marginTop={1}>
@@ -103,15 +104,18 @@ function StatusDisplay({
     >
       <Box marginTop={1}>
         <Text>
-          <Spinner type="dots" /> Waiting for authorization{dots}
+          <Spinner type="dots" /> {t('Waiting for authorization')}
+          {dots}
         </Text>
       </Box>
 
       <Box marginTop={1} justifyContent="space-between">
         <Text color={Colors.Gray}>
-          Time remaining: {formatTime(timeRemaining)}
+          {t('Time remaining:')} {formatTime(timeRemaining)}
+        </Text>
+        <Text color={Colors.AccentPurple}>
+          {t('(Press ESC or CTRL+C to cancel)')}
         </Text>
-        <Text color={Colors.AccentPurple}>(Press ESC or CTRL+C to cancel)</Text>
       </Box>
     </Box>
   );
@@ -215,19 +219,24 @@ export function QwenOAuthProgress({
         width="100%"
       >
         <Text bold color={Colors.AccentRed}>
-          Qwen OAuth Authentication Timeout
+          {t('Qwen OAuth Authentication Timeout')}
         </Text>
 
         <Box marginTop={1}>
           <Text>
             {authMessage ||
-              `OAuth token expired (over ${defaultTimeout} seconds). Please select authentication method again.`}
+              t(
+                'OAuth token expired (over {{seconds}} seconds). Please select authentication method again.',
+                {
+                  seconds: defaultTimeout.toString(),
+                },
+              )}
           </Text>
         </Box>
 
         <Box marginTop={1}>
           <Text color={Colors.Gray}>
-            Press any key to return to authentication type selection.
+            {t('Press any key to return to authentication type selection.')}
           </Text>
         </Box>
       </Box>
@@ -246,16 +255,17 @@ export function QwenOAuthProgress({
       >
         <Box>
           <Text>
-            <Spinner type="dots" /> Waiting for Qwen OAuth authentication...
+            <Spinner type="dots" />
+            {t('Waiting for Qwen OAuth authentication...')}
           </Text>
         </Box>
         <Box marginTop={1} justifyContent="space-between">
           <Text color={Colors.Gray}>
-            Time remaining: {Math.floor(timeRemaining / 60)}:
+            {t('Time remaining:')} {Math.floor(timeRemaining / 60)}:
             {(timeRemaining % 60).toString().padStart(2, '0')}
           </Text>
           <Text color={Colors.AccentPurple}>
-            (Press ESC or CTRL+C to cancel)
+            {t('(Press ESC or CTRL+C to cancel)')}
           </Text>
         </Box>
       </Box>
diff --git a/packages/cli/src/ui/components/SessionSummaryDisplay.tsx b/packages/cli/src/ui/components/SessionSummaryDisplay.tsx
index d4a0a11d..c8d79e0e 100644
--- a/packages/cli/src/ui/components/SessionSummaryDisplay.tsx
+++ b/packages/cli/src/ui/components/SessionSummaryDisplay.tsx
@@ -6,6 +6,7 @@
 
 import type React from 'react';
 import { StatsDisplay } from './StatsDisplay.js';
+import { t } from '../../i18n/index.js';
 
 interface SessionSummaryDisplayProps {
   duration: string;
@@ -14,5 +15,8 @@ interface SessionSummaryDisplayProps {
 export const SessionSummaryDisplay: React.FC<SessionSummaryDisplayProps> = ({
   duration,
 }) => (
-  <StatsDisplay title="Agent powering down. Goodbye!" duration={duration} />
+  <StatsDisplay
+    title={t('Agent powering down. Goodbye!')}
+    duration={duration}
+  />
 );
diff --git a/packages/cli/src/ui/components/ShellConfirmationDialog.tsx b/packages/cli/src/ui/components/ShellConfirmationDialog.tsx
index f2ab61b0..d83bf9bc 100644
--- a/packages/cli/src/ui/components/ShellConfirmationDialog.tsx
+++ b/packages/cli/src/ui/components/ShellConfirmationDialog.tsx
@@ -12,6 +12,7 @@ import { RenderInline } from '../utils/InlineMarkdownRenderer.js';
 import type { RadioSelectItem } from './shared/RadioButtonSelect.js';
 import { RadioButtonSelect } from './shared/RadioButtonSelect.js';
 import { useKeypress } from '../hooks/useKeypress.js';
+import { t } from '../../i18n/index.js';
 
 export interface ShellConfirmationRequest {
   commands: string[];
@@ -51,17 +52,17 @@ export const ShellConfirmationDialog: React.FC<
 
   const options: Array<RadioSelectItem<ToolConfirmationOutcome>> = [
     {
-      label: 'Yes, allow once',
+      label: t('Yes, allow once'),
       value: ToolConfirmationOutcome.ProceedOnce,
       key: 'Yes, allow once',
     },
     {
-      label: 'Yes, allow always for this session',
+      label: t('Yes, allow always for this session'),
       value: ToolConfirmationOutcome.ProceedAlways,
       key: 'Yes, allow always for this session',
     },
     {
-      label: 'No (esc)',
+      label: t('No (esc)'),
       value: ToolConfirmationOutcome.Cancel,
       key: 'No (esc)',
     },
@@ -78,10 +79,10 @@ export const ShellConfirmationDialog: React.FC<
     >
       <Box flexDirection="column" marginBottom={1}>
         <Text bold color={theme.text.primary}>
-          Shell Command Execution
+          {t('Shell Command Execution')}
         </Text>
         <Text color={theme.text.primary}>
-          A custom command wants to run the following shell commands:
+          {t('A custom command wants to run the following shell commands:')}
         </Text>
         <Box
           flexDirection="column"
@@ -99,7 +100,7 @@ export const ShellConfirmationDialog: React.FC<
       </Box>
 
       <Box marginBottom={1}>
-        <Text color={theme.text.primary}>Do you want to proceed?</Text>
+        <Text color={theme.text.primary}>{t('Do you want to proceed?')}</Text>
       </Box>
 
       <RadioButtonSelect items={options} onSelect={handleSelect} isFocused />
diff --git a/packages/cli/src/ui/components/StatsDisplay.tsx b/packages/cli/src/ui/components/StatsDisplay.tsx
index 8c7bacd7..a6511942 100644
--- a/packages/cli/src/ui/components/StatsDisplay.tsx
+++ b/packages/cli/src/ui/components/StatsDisplay.tsx
@@ -19,6 +19,7 @@ import {
   USER_AGREEMENT_RATE_MEDIUM,
 } from '../utils/displayUtils.js';
 import { computeSessionStats } from '../utils/computeStats.js';
+import { t } from '../../i18n/index.js';
 
 // A more flexible and powerful StatRow component
 interface StatRowProps {
@@ -85,22 +86,22 @@ const ModelUsageTable: React.FC<{
       <Box>
         <Box width={nameWidth}>
           <Text bold color={theme.text.primary}>
-            Model Usage
+            {t('Model Usage')}
           </Text>
         </Box>
         <Box width={requestsWidth} justifyContent="flex-end">
           <Text bold color={theme.text.primary}>
-            Reqs
+            {t('Reqs')}
           </Text>
         </Box>
         <Box width={inputTokensWidth} justifyContent="flex-end">
           <Text bold color={theme.text.primary}>
-            Input Tokens
+            {t('Input Tokens')}
           </Text>
         </Box>
         <Box width={outputTokensWidth} justifyContent="flex-end">
           <Text bold color={theme.text.primary}>
-            Output Tokens
+            {t('Output Tokens')}
           </Text>
         </Box>
       </Box>
@@ -141,13 +142,14 @@ const ModelUsageTable: React.FC<{
       {cacheEfficiency > 0 && (
         <Box flexDirection="column" marginTop={1}>
           <Text color={theme.text.primary}>
-            <Text color={theme.status.success}>Savings Highlight:</Text>{' '}
+            <Text color={theme.status.success}>{t('Savings Highlight:')}</Text>{' '}
             {totalCachedTokens.toLocaleString()} ({cacheEfficiency.toFixed(1)}
-            %) of input tokens were served from the cache, reducing costs.
+            %){' '}
+            {t('of input tokens were served from the cache, reducing costs.')}
           </Text>
           <Box height={1} />
           <Text color={theme.text.secondary}>
-            » Tip: For a full token breakdown, run `/stats model`.
+            » {t('Tip: For a full token breakdown, run `/stats model`.')}
           </Text>
         </Box>
       )}
@@ -199,7 +201,7 @@ export const StatsDisplay: React.FC<StatsDisplayProps> = ({
     }
     return (
       <Text bold color={theme.text.accent}>
-        Session Stats
+        {t('Session Stats')}
       </Text>
     );
   };
@@ -215,33 +217,33 @@ export const StatsDisplay: React.FC<StatsDisplayProps> = ({
       {renderTitle()}
       <Box height={1} />
 
-      <Section title="Interaction Summary">
-        <StatRow title="Session ID:">
+      <Section title={t('Interaction Summary')}>
+        <StatRow title={t('Session ID:')}>
           <Text color={theme.text.primary}>{stats.sessionId}</Text>
         </StatRow>
-        <StatRow title="Tool Calls:">
+        <StatRow title={t('Tool Calls:')}>
           <Text color={theme.text.primary}>
             {tools.totalCalls} ({' '}
             <Text color={theme.status.success}>✓ {tools.totalSuccess}</Text>{' '}
             <Text color={theme.status.error}>x {tools.totalFail}</Text> )
           </Text>
         </StatRow>
-        <StatRow title="Success Rate:">
+        <StatRow title={t('Success Rate:')}>
           <Text color={successColor}>{computed.successRate.toFixed(1)}%</Text>
         </StatRow>
         {computed.totalDecisions > 0 && (
-          <StatRow title="User Agreement:">
+          <StatRow title={t('User Agreement:')}>
             <Text color={agreementColor}>
               {computed.agreementRate.toFixed(1)}%{' '}
               <Text color={theme.text.secondary}>
-                ({computed.totalDecisions} reviewed)
+                ({computed.totalDecisions} {t('reviewed')})
               </Text>
             </Text>
           </StatRow>
         )}
         {files &&
           (files.totalLinesAdded > 0 || files.totalLinesRemoved > 0) && (
-            <StatRow title="Code Changes:">
+            <StatRow title={t('Code Changes:')}>
               <Text color={theme.text.primary}>
                 <Text color={theme.status.success}>
                   +{files.totalLinesAdded}
@@ -254,16 +256,16 @@ export const StatsDisplay: React.FC<StatsDisplayProps> = ({
           )}
       </Section>
 
-      <Section title="Performance">
-        <StatRow title="Wall Time:">
+      <Section title={t('Performance')}>
+        <StatRow title={t('Wall Time:')}>
           <Text color={theme.text.primary}>{duration}</Text>
         </StatRow>
-        <StatRow title="Agent Active:">
+        <StatRow title={t('Agent Active:')}>
           <Text color={theme.text.primary}>
             {formatDuration(computed.agentActiveTime)}
           </Text>
         </StatRow>
-        <SubStatRow title="API Time:">
+        <SubStatRow title={t('API Time:')}>
           <Text color={theme.text.primary}>
             {formatDuration(computed.totalApiTime)}{' '}
             <Text color={theme.text.secondary}>
@@ -271,7 +273,7 @@ export const StatsDisplay: React.FC<StatsDisplayProps> = ({
             </Text>
           </Text>
         </SubStatRow>
-        <SubStatRow title="Tool Time:">
+        <SubStatRow title={t('Tool Time:')}>
           <Text color={theme.text.primary}>
             {formatDuration(computed.totalToolTime)}{' '}
             <Text color={theme.text.secondary}>
diff --git a/packages/cli/src/ui/components/Tips.tsx b/packages/cli/src/ui/components/Tips.tsx
index 810d57ef..c8537b55 100644
--- a/packages/cli/src/ui/components/Tips.tsx
+++ b/packages/cli/src/ui/components/Tips.tsx
@@ -8,6 +8,7 @@ import type React from 'react';
 import { Box, Text } from 'ink';
 import { theme } from '../semantic-colors.js';
 import { type Config } from '@qwen-code/qwen-code-core';
+import { t } from '../../i18n/index.js';
 
 interface TipsProps {
   config: Config;
@@ -17,12 +18,12 @@ export const Tips: React.FC<TipsProps> = ({ config }) => {
   const geminiMdFileCount = config.getGeminiMdFileCount();
   return (
     <Box flexDirection="column">
-      <Text color={theme.text.primary}>Tips for getting started:</Text>
+      <Text color={theme.text.primary}>{t('Tips for getting started:')}</Text>
       <Text color={theme.text.primary}>
-        1. Ask questions, edit files, or run commands.
+        {t('1. Ask questions, edit files, or run commands.')}
       </Text>
       <Text color={theme.text.primary}>
-        2. Be specific for the best results.
+        {t('2. Be specific for the best results.')}
       </Text>
       {geminiMdFileCount === 0 && (
         <Text color={theme.text.primary}>
@@ -30,7 +31,7 @@ export const Tips: React.FC<TipsProps> = ({ config }) => {
           <Text bold color={theme.text.accent}>
             QWEN.md
           </Text>{' '}
-          files to customize your interactions with Qwen Code.
+          {t('files to customize your interactions with Qwen Code.')}
         </Text>
       )}
       <Text color={theme.text.primary}>
@@ -38,7 +39,7 @@ export const Tips: React.FC<TipsProps> = ({ config }) => {
         <Text bold color={theme.text.accent}>
           /help
         </Text>{' '}
-        for more information.
+        {t('for more information.')}
       </Text>
     </Box>
   );
diff --git a/packages/cli/src/ui/components/WelcomeBackDialog.tsx b/packages/cli/src/ui/components/WelcomeBackDialog.tsx
index d16a2d8c..5ce5de31 100644
--- a/packages/cli/src/ui/components/WelcomeBackDialog.tsx
+++ b/packages/cli/src/ui/components/WelcomeBackDialog.tsx
@@ -12,6 +12,7 @@ import {
   type RadioSelectItem,
 } from './shared/RadioButtonSelect.js';
 import { useKeypress } from '../hooks/useKeypress.js';
+import { t } from '../../i18n/index.js';
 
 interface WelcomeBackDialogProps {
   welcomeBackInfo: ProjectSummaryInfo;
@@ -36,12 +37,12 @@ export function WelcomeBackDialog({
   const options: Array<RadioSelectItem<'restart' | 'continue'>> = [
     {
       key: 'restart',
-      label: 'Start new chat session',
+      label: t('Start new chat session'),
       value: 'restart',
     },
     {
       key: 'continue',
-      label: 'Continue previous conversation',
+      label: t('Continue previous conversation'),
       value: 'continue',
     },
   ];
@@ -67,7 +68,9 @@ export function WelcomeBackDialog({
     >
       <Box flexDirection="column" marginBottom={1}>
         <Text color={Colors.AccentBlue} bold>
-          👋 Welcome back! (Last updated: {timeAgo})
+          {t('👋 Welcome back! (Last updated: {{timeAgo}})', {
+            timeAgo: timeAgo || '',
+          })}
         </Text>
       </Box>
 
@@ -75,7 +78,7 @@ export function WelcomeBackDialog({
       {goalContent && (
         <Box flexDirection="column" marginBottom={1}>
           <Text color={Colors.Foreground} bold>
-            🎯 Overall Goal:
+            {t('🎯 Overall Goal:')}
           </Text>
           <Box marginTop={1} paddingLeft={2}>
             <Text color={Colors.Gray}>{goalContent}</Text>
@@ -87,19 +90,25 @@ export function WelcomeBackDialog({
       {totalTasks > 0 && (
         <Box flexDirection="column" marginBottom={1}>
           <Text color={Colors.Foreground} bold>
-            📋 Current Plan:
+            📋 {t('Current Plan:')}
           </Text>
           <Box marginTop={1} paddingLeft={2}>
             <Text color={Colors.Gray}>
-              Progress: {doneCount}/{totalTasks} tasks completed
-              {inProgressCount > 0 && `, ${inProgressCount} in progress`}
+              {t('Progress: {{done}}/{{total}} tasks completed', {
+                done: String(doneCount),
+                total: String(totalTasks),
+              })}
+              {inProgressCount > 0 &&
+                t(', {{inProgress}} in progress', {
+                  inProgress: String(inProgressCount),
+                })}
             </Text>
           </Box>
 
           {pendingTasks.length > 0 && (
             <Box flexDirection="column" marginTop={1} paddingLeft={2}>
               <Text color={Colors.Foreground} bold>
-                Pending Tasks:
+                {t('Pending Tasks:')}
               </Text>
               {pendingTasks.map((task: string, index: number) => (
                 <Text key={index} color={Colors.Gray}>
@@ -113,8 +122,8 @@ export function WelcomeBackDialog({
 
       {/* Action Selection */}
       <Box flexDirection="column" marginTop={1}>
-        <Text bold>What would you like to do?</Text>
-        <Text>Choose how to proceed with your session:</Text>
+        <Text bold>{t('What would you like to do?')}</Text>
+        <Text>{t('Choose how to proceed with your session:')}</Text>
       </Box>
 
       <Box marginTop={1}>