import * as i0 from "@angular/core";
export declare class LangCodeService {
    private doc;
    private readonly langMap;
    private readonly reverseMap;
    constructor(doc: Document);
    private normalize;
    toFull(loc: string, fallback?: string): string;
    toShort(loc: string, fallback?: string): string;
    getHtmlLangCode(loc: string): string;
    applyHtmlLang(loc: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<LangCodeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<LangCodeService>;
}