/** * Copyright IBM Corp. 2025 * * This source code is licensed under the Apache-2.0 license found in the * LICENSE file in the root directory of this source tree. */ type Subscriber = (lang: string) => void; /** * Retrieves the current document language. Falls back to the browser's * `navigator.language` if the `` lang attribute is empty. * * @returns {string} The current document language code. */ export declare function getDocumentLang(): string; /** * Subscribes to changes on the `` element's `lang` attribute. * Uses a shared MutationObserver under the hood to watch for attribute * mutations. * * @param {Subscriber} callback - Invoked with the new language code whenever * it changes. * @returns {() => void} A function that, when called, removes this subscription */ export declare function subscribeDocumentLangChange(callback: Subscriber): () => void; export {};