import { StaffbaseLocale } from '../types/i18n/StaffbaseLocale';
/**
 * Normalizes an arbitrary language tag to a canonical Staffbase locale code.
 *
 * Accepts the loose forms widgets receive in practice - BCP-47 (`en-US`),
 * snake_case (`en_US`), wrong casing (`EN_us`), or a bare language (`en`) - and
 * returns the exactly-cased supported locale (`en_US`). A full tag with an
 * unsupported region falls back to the language's default region
 * (`es_AR` -> `es_ES`). Returns null when the language is not supported at all.
 * @param {string | null | undefined} input - The language tag to normalize.
 * @returns {StaffbaseLocale | null} The canonical locale, or null when unsupported.
 */
export declare const normalizeLanguageCode: (input: string | null | undefined) => StaffbaseLocale | null;
//# sourceMappingURL=normalizeLanguageCode.d.ts.map