import type { Alphabetical } from "../types.js";
/**
 * Default language supported by all i18n providers.
 */
export declare const defaultLanguage: "en";
/**
 * Extracts the first portion of strings that include a hyphen.
 */
export type Language<T extends string> = ExtractLanguage<T> | typeof defaultLanguage;
/**
 * Extracts the languages from a union of languages or regionalized languages
 */
type ExtractLanguage<T extends string> = T extends `_` | `-` | `` ? never : T extends Alphabetical<T> ? T : T extends `${infer L}${`_` | `-`}${infer R}` ? L extends Alphabetical<L> ? R extends Alphabetical<R> ? L | T : never : never : never;
export {};