import { Observable } from "rxjs";
import { IEnSrvOptions } from "./IEnSrvOptions";
export interface ILocale {
    lang: string;
    timezone: string;
    dateFormat: string;
    datetimeFormat: string;
}
export declare function locale(enSrvOptions: IEnSrvOptions): Observable<ILocale>;
export declare function nowVar(enSrvOptions: IEnSrvOptions): Observable<string>;
export declare function getLangs(enSrvOptions: IEnSrvOptions, lang?: string | string[], includeFallbackLang?: boolean): Observable<string[]>;