export type Lang = 'en-us' | 'zh-cn' | string;
export type LocaleMessages = Record<string, string>;
/**
 * 注册扩展语言包，可覆盖默认语言包
 */
export declare const registerLocale: (lang: Lang, messages: LocaleMessages) => void;
export declare const useI18n: () => {
    locale: string;
    t: (key: string) => string;
};