import { TranslateService } from '@ngx-translate/core';
import * as i0 from "@angular/core";
export declare class TranslateLanguageService {
    protected translateService: TranslateService;
    static PREFERRED_LANGUAGES: string[];
    private _availableLanguages;
    /**
     * @param langCode - ISO 639-2 (3 characters)
     * @param language - ISO 639-1 (2 characters)
     * @return human language - string
     */
    translate(langCode: string, language?: string): any;
    static ɵfac: i0.ɵɵFactoryDeclaration<TranslateLanguageService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TranslateLanguageService>;
}