/** Get the user's locale or, if that has not been set, the instance locale
 *
 * WARNING: Certain locale codes, like 'pt_BR', are not supported by the native
 * Intl API, which wants to see 'pt-BR'. These will cause an error if they are
 * passed to String.localeCompare.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/localeCompare#locales
 * */
export declare const useLocale: () => string;
