feat: adjust code

packages/cli/src/i18n/languages.ts

@@ -0,0 +1,48 @@
+/**
+ * @license
+ * Copyright 2025 Qwen team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export type SupportedLanguage = 'en' | 'zh' | 'ru' | 'de' | string;
+
+export interface LanguageDefinition {
+  /** The internal locale code used by the i18n system (e.g., 'en', 'zh'). */
+  code: SupportedLanguage;
+  /** The standard name used in UI settings (e.g., 'en-US', 'zh-CN'). */
+  id: string;
+  /** The full English name of the language (e.g., 'English', 'Chinese'). */
+  fullName: string;
+}
+
+export const SUPPORTED_LANGUAGES: readonly LanguageDefinition[] = [
+  {
+    code: 'en',
+    id: 'en-US',
+    fullName: 'English',
+  },
+  {
+    code: 'zh',
+    id: 'zh-CN',
+    fullName: 'Chinese',
+  },
+  {
+    code: 'ru',
+    id: 'ru-RU',
+    fullName: 'Russian',
+  },
+  {
+    code: 'de',
+    id: 'de-DE',
+    fullName: 'German',
+  },
+];
+
+/**
+ * Maps a locale code to its English language name.
+ * Used for LLM output language instructions.
+ */
+export function getLanguageNameFromLocale(locale: SupportedLanguage): string {
+  const lang = SUPPORTED_LANGUAGES.find((l) => l.code === locale);
+  return lang?.fullName || 'English';
+}