type CookieRef = {
    value: string | null;
};
/** Callback to get locale from route (RouteService.getCurrentLocale) */
export type GetLocaleFromRoute = (route?: unknown) => string;
export interface ResolveInitialLocaleOptions {
    route: unknown;
    serverLocale?: string | null;
    getLocaleFromRoute: GetLocaleFromRoute;
}
/**
 * Centralized entry point for i18n locale management.
 * Combines useState('i18n-locale'), locale cookie, and sync utilities.
 */
export declare function useI18nLocale(): {
    locale: import("vue").Ref<string | null, string | null>;
    localeCookie: CookieRef;
    hashCookie: CookieRef;
    getPreferredLocale: () => string | null;
    getLocale: () => string | null;
    getLocaleWithServerFallback: (serverLocale?: string | null) => string | null;
    getEffectiveLocale: (route: unknown, getLocaleFromRoute: GetLocaleFromRoute) => string;
    resolveInitialLocale: (options: ResolveInitialLocaleOptions) => string;
    setLocale: (locale: string | null) => void;
    syncLocale: (locale: string | null) => void;
    isValidLocale: (locale: string | null | undefined) => locale is string;
    validLocales: string[];
};
export {};