export declare const _: (category: string, key: string, args?: any) => string;
export declare namespace i18n {
    interface StringsMap {
        [key: string]: string | string[];
    }
    interface StringsCategory {
        [module: string]: StringsMap;
    }
    interface Strings {
        [lang: string]: StringsCategory;
    }
    const setLocale: (value: string) => string;
    const register: (i18n?: StringsCategory | undefined) => void;
    const registerCategories: (lang: string, strings: StringsCategory) => void;
}