feat: Update docs

docs/cli/commands.md

@@ -195,6 +195,16 @@ Slash commands provide meta-level control over the CLI itself.
 - **`/init`**
   - **Description:** Analyzes the current directory and creates a `QWEN.md` context file by default (or the filename specified by `contextFileName`). If a non-empty file already exists, no changes are made. The command seeds an empty file and prompts the model to populate it with project-specific instructions.
 
+- [**`/language`**](./language.md)
+  - **Description:** View or change the language setting for both UI and LLM output.
+  - **Sub-commands:**
+    - **`ui`**: Set the UI language (zh-CN or en-US)
+    - **`output`**: Set the LLM output language
+  - **Usage:** `/language [ui|output] [language]`
+  - **Examples:**
+    - `/language ui zh-CN` (set UI language to Simplified Chinese)
+    - `/language output English` (set LLM output language to English)
+
 ### Custom Commands
 
 For a quick start, see the [example](#example-a-pure-function-refactoring-command) below.

docs/cli/language.md

@@ -0,0 +1,71 @@
+# Language Command
+
+The `/language` command allows you to customize the language settings for both the Qwen Code user interface (UI) and the language model's output. This command supports two distinct functionalities:
+
+1. Setting the UI language for the Qwen Code interface
+2. Setting the output language for the language model (LLM)
+
+## UI Language Settings
+
+To change the UI language of Qwen Code, use the `ui` subcommand:
+
+```
+/language ui [zh-CN|en-US]
+```
+
+### Available UI Languages
+
+- **zh-CN**: Simplified Chinese (简体中文)
+- **en-US**: English
+
+### Examples
+
+```
+/language ui zh-CN    # Set UI language to Simplified Chinese
+/language ui en-US    # Set UI language to English
+```
+
+### UI Language Subcommands
+
+You can also use direct subcommands for convenience:
+
+- `/language ui zh-CN` or `/language ui zh` or `/language ui 中文`
+- `/language ui en-US` or `/language ui en` or `/language ui english`
+
+## LLM Output Language Settings
+
+To set the language for the language model's responses, use the `output` subcommand:
+
+```
+/language output <language>
+```
+
+This command generates a language rule file that instructs the LLM to respond in the specified language. The rule file is saved to `~/.qwen/output-language.md`.
+
+### Examples
+
+```
+/language output 中文      # Set LLM output language to Chinese
+/language output English   # Set LLM output language to English
+/language output 日本語    # Set LLM output language to Japanese
+```
+
+## Viewing Current Settings
+
+When used without arguments, the `/language` command displays the current language settings:
+
+```
+/language
+```
+
+This will show:
+
+- Current UI language
+- Current LLM output language (if set)
+- Available subcommands
+
+## Notes
+
+- UI language changes take effect immediately and reload all command descriptions
+- LLM output language settings are persisted in a rule file that is automatically included in the model's context
+- To request additional UI language packs, please open an issue on GitHub

packages/cli/src/i18n/locales/en.js

@@ -112,8 +112,39 @@ export default {
   'IDE integration is not supported in your current environment. To use this feature, run Qwen Code in one of these supported IDEs: VS Code or VS Code forks.':
     'IDE integration is not supported in your current environment. To use this feature, run Qwen Code in one of these supported IDEs: VS Code or VS Code forks.',
   'Set up GitHub Actions': 'Set up GitHub Actions',
-  'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf)':
+  'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf, Trae)':
-    'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf)',
+    'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf, Trae)',
+  'Please restart your terminal for the changes to take effect.':
+    'Please restart your terminal for the changes to take effect.',
+  'Failed to configure terminal: {{error}}':
+    'Failed to configure terminal: {{error}}',
+  'Could not determine {{terminalName}} config path on Windows: APPDATA environment variable is not set.':
+    'Could not determine {{terminalName}} config path on Windows: APPDATA environment variable is not set.',
+  '{{terminalName}} keybindings.json exists but is not a valid JSON array. Please fix the file manually or delete it to allow automatic configuration.':
+    '{{terminalName}} keybindings.json exists but is not a valid JSON array. Please fix the file manually or delete it to allow automatic configuration.',
+  'File: {{file}}': 'File: {{file}}',
+  'Failed to parse {{terminalName}} keybindings.json. The file contains invalid JSON. Please fix the file manually or delete it to allow automatic configuration.':
+    'Failed to parse {{terminalName}} keybindings.json. The file contains invalid JSON. Please fix the file manually or delete it to allow automatic configuration.',
+  'Error: {{error}}': 'Error: {{error}}',
+  'Shift+Enter binding already exists': 'Shift+Enter binding already exists',
+  'Ctrl+Enter binding already exists': 'Ctrl+Enter binding already exists',
+  'Existing keybindings detected. Will not modify to avoid conflicts.':
+    'Existing keybindings detected. Will not modify to avoid conflicts.',
+  'Please check and modify manually if needed: {{file}}':
+    'Please check and modify manually if needed: {{file}}',
+  'Added Shift+Enter and Ctrl+Enter keybindings to {{terminalName}}.':
+    'Added Shift+Enter and Ctrl+Enter keybindings to {{terminalName}}.',
+  'Modified: {{file}}': 'Modified: {{file}}',
+  '{{terminalName}} keybindings already configured.':
+    '{{terminalName}} keybindings already configured.',
+  'Failed to configure {{terminalName}}.':
+    'Failed to configure {{terminalName}}.',
+  'Your terminal is already configured for an optimal experience with multiline input (Shift+Enter and Ctrl+Enter).':
+    'Your terminal is already configured for an optimal experience with multiline input (Shift+Enter and Ctrl+Enter).',
+  'Could not detect terminal type. Supported terminals: VS Code, Cursor, Windsurf, and Trae.':
+    'Could not detect terminal type. Supported terminals: VS Code, Cursor, Windsurf, and Trae.',
+  'Terminal "{{terminal}}" is not supported yet.':
+    'Terminal "{{terminal}}" is not supported yet.',
 
   // ============================================================================
   // Commands - Language

packages/cli/src/i18n/locales/zh.js

@@ -106,8 +106,37 @@ export default {
   'IDE integration is not supported in your current environment. To use this feature, run Qwen Code in one of these supported IDEs: VS Code or VS Code forks.':
     '您当前环境不支持 IDE 集成。要使用此功能，请在以下支持的 IDE 之一中运行 Qwen Code：VS Code 或 VS Code 分支版本。',
   'Set up GitHub Actions': '设置 GitHub Actions',
-  'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf)':
+  'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf, Trae)':
-    '配置终端按键绑定以支持多行输入（VS Code、Cursor、Windsurf）',
+    '配置终端按键绑定以支持多行输入（VS Code、Cursor、Windsurf、Trae）',
+  'Please restart your terminal for the changes to take effect.':
+    '请重启终端以使更改生效。',
+  'Failed to configure terminal: {{error}}': '配置终端失败：{{error}}',
+  'Could not determine {{terminalName}} config path on Windows: APPDATA environment variable is not set.':
+    '无法确定 {{terminalName}} 在 Windows 上的配置路径：未设置 APPDATA 环境变量。',
+  '{{terminalName}} keybindings.json exists but is not a valid JSON array. Please fix the file manually or delete it to allow automatic configuration.':
+    '{{terminalName}} keybindings.json 存在但不是有效的 JSON 数组。请手动修复文件或删除它以允许自动配置。',
+  'File: {{file}}': '文件：{{file}}',
+  'Failed to parse {{terminalName}} keybindings.json. The file contains invalid JSON. Please fix the file manually or delete it to allow automatic configuration.':
+    '解析 {{terminalName}} keybindings.json 失败。文件包含无效的 JSON。请手动修复文件或删除它以允许自动配置。',
+  'Error: {{error}}': '错误：{{error}}',
+  'Shift+Enter binding already exists': 'Shift+Enter 绑定已存在',
+  'Ctrl+Enter binding already exists': 'Ctrl+Enter 绑定已存在',
+  'Existing keybindings detected. Will not modify to avoid conflicts.':
+    '检测到现有按键绑定。为避免冲突，不会修改。',
+  'Please check and modify manually if needed: {{file}}':
+    '如有需要，请手动检查并修改：{{file}}',
+  'Added Shift+Enter and Ctrl+Enter keybindings to {{terminalName}}.':
+    '已为 {{terminalName}} 添加 Shift+Enter 和 Ctrl+Enter 按键绑定。',
+  'Modified: {{file}}': '已修改：{{file}}',
+  '{{terminalName}} keybindings already configured.':
+    '{{terminalName}} 按键绑定已配置。',
+  'Failed to configure {{terminalName}}.': '配置 {{terminalName}} 失败。',
+  'Your terminal is already configured for an optimal experience with multiline input (Shift+Enter and Ctrl+Enter).':
+    '您的终端已配置为支持多行输入（Shift+Enter 和 Ctrl+Enter）的最佳体验。',
+  'Could not detect terminal type. Supported terminals: VS Code, Cursor, Windsurf, and Trae.':
+    '无法检测终端类型。支持的终端：VS Code、Cursor、Windsurf 和 Trae。',
+  'Terminal "{{terminal}}" is not supported yet.':
+    '终端 "{{terminal}}" 尚未支持。',
 
   // ============================================================================
   // Commands - Language

packages/cli/src/ui/commands/terminalSetupCommand.ts

@@ -7,6 +7,7 @@
 import type { MessageActionReturn, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
 import { terminalSetup } from '../utils/terminalSetup.js';
+import { t } from '../../i18n/index.js';
 
 /**
  * Command to configure terminal keybindings for multiline input support.
@@ -16,8 +17,11 @@ import { terminalSetup } from '../utils/terminalSetup.js';
  */
 export const terminalSetupCommand: SlashCommand = {
   name: 'terminal-setup',
-  description:
+  get description() {
+    return t(
       'Configure terminal keybindings for multiline input (VS Code, Cursor, Windsurf, Trae)',
+    );
+  },
   kind: CommandKind.BUILT_IN,
 
   action: async (): Promise<MessageActionReturn> => {
@@ -27,7 +31,8 @@ export const terminalSetupCommand: SlashCommand = {
       let content = result.message;
       if (result.requiresRestart) {
         content +=
-          '\n\nPlease restart your terminal for the changes to take effect.';
+          '\n\n' +
+          t('Please restart your terminal for the changes to take effect.');
       }
 
       return {
@@ -38,7 +43,9 @@ export const terminalSetupCommand: SlashCommand = {
     } catch (error) {
       return {
         type: 'message',
-        content: `Failed to configure terminal: ${error}`,
+        content: t('Failed to configure terminal: {{error}}', {
+          error: String(error),
+        }),
         messageType: 'error',
       };
     }

packages/cli/src/ui/utils/terminalSetup.ts

@@ -30,6 +30,7 @@ import { exec } from 'node:child_process';
 import { promisify } from 'node:util';
 import { isKittyProtocolEnabled } from './kittyProtocolDetector.js';
 import { VSCODE_SHIFT_ENTER_SEQUENCE } from './platformConstants.js';
+import { t } from '../../i18n/index.js';
 
 const execAsync = promisify(exec);
 
@@ -146,7 +147,10 @@ async function configureVSCodeStyle(
   if (!configDir) {
     return {
       success: false,
-      message: `Could not determine ${terminalName} config path on Windows: APPDATA environment variable is not set.`,
+      message: t(
+        'Could not determine {{terminalName}} config path on Windows: APPDATA environment variable is not set.',
+        { terminalName },
+      ),
     };
   }
 
@@ -166,9 +170,12 @@ async function configureVSCodeStyle(
           return {
             success: false,
             message:
-              `${terminalName} keybindings.json exists but is not a valid JSON array. ` +
+              t(
-              `Please fix the file manually or delete it to allow automatic configuration.\n` +
+                '{{terminalName}} keybindings.json exists but is not a valid JSON array. Please fix the file manually or delete it to allow automatic configuration.',
-              `File: ${keybindingsFile}`,
+                { terminalName },
+              ) +
+              '\n' +
+              t('File: {{file}}', { file: keybindingsFile }),
           };
         }
         keybindings = parsedContent;
@@ -176,10 +183,14 @@ async function configureVSCodeStyle(
         return {
           success: false,
           message:
-            `Failed to parse ${terminalName} keybindings.json. The file contains invalid JSON.\n` +
+            t(
-            `Please fix the file manually or delete it to allow automatic configuration.\n` +
+              'Failed to parse {{terminalName}} keybindings.json. The file contains invalid JSON. Please fix the file manually or delete it to allow automatic configuration.',
-            `File: ${keybindingsFile}\n` +
+              { terminalName },
-            `Error: ${parseError}`,
+            ) +
+            '\n' +
+            t('File: {{file}}', { file: keybindingsFile }) +
+            '\n' +
+            t('Error: {{error}}', { error: String(parseError) }),
         };
       }
     } catch {
@@ -214,18 +225,23 @@ async function configureVSCodeStyle(
     if (existingShiftEnter || existingCtrlEnter) {
       const messages: string[] = [];
       if (existingShiftEnter) {
-        messages.push(`- Shift+Enter binding already exists`);
+        messages.push('- ' + t('Shift+Enter binding already exists'));
       }
       if (existingCtrlEnter) {
-        messages.push(`- Ctrl+Enter binding already exists`);
+        messages.push('- ' + t('Ctrl+Enter binding already exists'));
       }
       return {
         success: false,
         message:
-          `Existing keybindings detected. Will not modify to avoid conflicts.\n` +
+          t(
+            'Existing keybindings detected. Will not modify to avoid conflicts.',
+          ) +
+          '\n' +
           messages.join('\n') +
           '\n' +
-          `Please check and modify manually if needed: ${keybindingsFile}`,
+          t('Please check and modify manually if needed: {{file}}', {
+            file: keybindingsFile,
+          }),
       };
     }
 
@@ -263,19 +279,34 @@ async function configureVSCodeStyle(
       await fs.writeFile(keybindingsFile, JSON.stringify(keybindings, null, 4));
       return {
         success: true,
-        message: `Added Shift+Enter and Ctrl+Enter keybindings to ${terminalName}.\nModified: ${keybindingsFile}`,
+        message:
+          t(
+            'Added Shift+Enter and Ctrl+Enter keybindings to {{terminalName}}.',
+            {
+              terminalName,
+            },
+          ) +
+          '\n' +
+          t('Modified: {{file}}', { file: keybindingsFile }),
         requiresRestart: true,
       };
     } else {
       return {
         success: true,
-        message: `${terminalName} keybindings already configured.`,
+        message: t('{{terminalName}} keybindings already configured.', {
+          terminalName,
+        }),
       };
     }
   } catch (error) {
     return {
       success: false,
-      message: `Failed to configure ${terminalName}.\nFile: ${keybindingsFile}\nError: ${error}`,
+      message:
+        t('Failed to configure {{terminalName}}.', { terminalName }) +
+        '\n' +
+        t('File: {{file}}', { file: keybindingsFile }) +
+        '\n' +
+        t('Error: {{error}}', { error: String(error) }),
     };
   }
 }
@@ -322,8 +353,9 @@ export async function terminalSetup(): Promise<TerminalSetupResult> {
   if (isKittyProtocolEnabled()) {
     return {
       success: true,
-      message:
+      message: t(
         'Your terminal is already configured for an optimal experience with multiline input (Shift+Enter and Ctrl+Enter).',
+      ),
     };
   }
 
@@ -332,8 +364,9 @@ export async function terminalSetup(): Promise<TerminalSetupResult> {
   if (!terminal) {
     return {
       success: false,
-      message:
+      message: t(
-        'Could not detect terminal type. Supported terminals: VS Code, Cursor, and Windsurf.',
+        'Could not detect terminal type. Supported terminals: VS Code, Cursor, Windsurf, and Trae.',
+      ),
     };
   }
 
@@ -349,7 +382,9 @@ export async function terminalSetup(): Promise<TerminalSetupResult> {
     default:
       return {
         success: false,
-        message: `Terminal "${terminal}" is not supported yet.`,
+        message: t('Terminal "{{terminal}}" is not supported yet.', {
+          terminal,
+        }),
       };
   }
 }