/** Internal, deterministic browser-language negotiation; catalogue spelling is retained. */
export declare function resolveBrowserLocale(available: string[], fallback: string, languages: readonly string[]): string;
export declare function createLocalePreferences(available: string[], fallback: string, project: string, languages: readonly string[], storage?: Pick<Storage, "getItem" | "setItem" | "removeItem">): {
    preference: import('canvasengine').WritableSignal<string>;
    resolve: () => string;
    select(value: string): void;
};