feat(i18n): Add Internationalization Support for UI and LLM Output (#1058)

packages/cli/src/config/config.ts

@@ -23,6 +23,7 @@ import {
   WriteFileTool,
   resolveTelemetrySettings,
   FatalConfigError,
+  Storage,
   InputFormat,
   OutputFormat,
 } from '@qwen-code/qwen-code-core';
@@ -602,6 +603,20 @@ export async function loadCliConfig(
     (e) => e.contextFiles,
   );
 
+  // Automatically load output-language.md if it exists
+  const outputLanguageFilePath = path.join(
+    Storage.getGlobalQwenDir(),
+    'output-language.md',
+  );
+  if (fs.existsSync(outputLanguageFilePath)) {
+    extensionContextFilePaths.push(outputLanguageFilePath);
+    if (debugMode) {
+      logger.debug(
+        `Found output-language.md, adding to context files: ${outputLanguageFilePath}`,
+      );
+    }
+  }
+
   const fileService = new FileDiscoveryService(cwd);
 
   const fileFiltering = {

packages/cli/src/config/settingsSchema.ts

@@ -176,6 +176,23 @@ const SETTINGS_SCHEMA = {
         description: 'Enable debug logging of keystrokes to the console.',
         showInDialog: true,
       },
+      language: {
+        type: 'enum',
+        label: 'Language',
+        category: 'General',
+        requiresRestart: false,
+        default: 'auto',
+        description:
+          'The language for the user interface. Use "auto" to detect from system settings. ' +
+          'You can also use custom language codes (e.g., "es", "fr") by placing JS language files ' +
+          'in ~/.qwen/locales/ (e.g., ~/.qwen/locales/es.js).',
+        showInDialog: true,
+        options: [
+          { value: 'auto', label: 'Auto (detect from system)' },
+          { value: 'en', label: 'English' },
+          { value: 'zh', label: '中文 (Chinese)' },
+        ],
+      },
     },
   },
   output: {