/**
 * @license
 * Copyright 2025 Qwen
 * SPDX-License-Identifier: Apache-2.0
 */
export type SupportedLanguage = 'en' | 'zh' | string;
/**
 * Get the path to the user's custom locales directory.
 * Users can place custom language packs (e.g., es.js, fr.js) in this directory.
 * @returns The path to ~/.qwen/locales
 */
export declare function getUserLocalesDirectory(): string;
export declare function detectSystemLanguage(): SupportedLanguage;
export declare function setLanguage(lang: SupportedLanguage | 'auto'): void;
export declare function setLanguageAsync(lang: SupportedLanguage | 'auto'): Promise<void>;
export declare function getCurrentLanguage(): SupportedLanguage;
export declare function t(key: string, params?: Record<string, string>): string;
export declare function initializeI18n(lang?: SupportedLanguage | 'auto'): Promise<void>;