/**
 * Widget languages.
 *
 * English is the default. Arabic is the one additional language today, and it
 * flips the widget to right-to-left. Anything else — including an unknown
 * BCP-47 tag — resolves to English rather than to a half-translated surface.
 */
export declare const WIDGET_LANGUAGES: readonly ["en", "ar"];
export type WidgetLanguage = (typeof WIDGET_LANGUAGES)[number];
export declare const DEFAULT_WIDGET_LANGUAGE: WidgetLanguage;
export type TextDirection = 'ltr' | 'rtl';
export declare const isWidgetLanguage: (value: unknown) => value is "en" | "ar";
/**
 * Normalize whatever an embedder or a deployment config hands over into a
 * supported language: `'ar-SA'` and `'AR'` are Arabic, `undefined`, `''` and
 * `'fr'` are English.
 */
export declare const resolveWidgetLanguage: (value: unknown) => WidgetLanguage;
export declare const directionFor: (language: WidgetLanguage) => TextDirection;