/**
 * Minimal i18n for CLI user-facing strings.
 *
 * Language detection priority:
 *   1. --lang=en CLI flag
 *   2. AO_LANG env var
 *   3. LANG env var (en_US.UTF-8 → en)
 *   4. Default: zh
 */
type Lang = 'zh' | 'en';
export declare function detectLang(argv?: string[]): Lang;
export declare function setLang(lang: Lang): void;
type Dict = Record<string, {
    zh: string;
    en: string;
}>;
declare const dict: Dict;
export declare function t(key: keyof typeof dict, params?: Record<string, string | number>): string;
export {};