export declare function onLanguageChange(callback: (lng: string) => void): () => void;
export declare function initI18n(resources: any, defaultLang?: string, currentLang?: string, cookieHeader?: string): import("i18next").i18n;
export declare function changeLanguage(lng: string): Promise<any>;
export declare function getCurrentLanguage(): string;
export declare function detectLanguageFromCookies(cookieHeader?: string): string;
export declare function initLanguageFromRequest(resources: any, defaultLang?: string, request?: {
    headers?: {
        cookie?: string;
        'accept-language'?: string;
    };
}): string;
export declare function detectLanguageFromHeader(acceptLanguage?: string): string;
export declare function getLanguageDirection(language: string): 'rtl' | 'ltr';
export declare function setCurrentLanguage(lng: string): void;
export declare function hydrateLanguage(callback?: () => void): void;
export declare function getI18nInstance(): import("i18next").i18n;
export declare function translate(key: string, fallback?: string, options?: any): string;
export declare function updateDocumentLanguage(lang?: string): void;
export declare function getI18nDebugInfo(): {
    isInitialized: boolean;
    currentLanguage: string;
    globalCurrentLang: string | null;
    globalDefaultLang: string;
    isSSR: boolean;
    cookies: string | null;
    localStorage: string | null;
};