/** @returns {'en' | 'fr'} */
export function getLanguage(): "en" | "fr";
/** @param {'en' | 'fr'} language */
export function setLanguage(language: "en" | "fr"): void;
/**
 * @param {string} key
 * @param {Record<string, string | number>} [params]
 * @returns {string}
 */
export function t(key: string, params?: Record<string, string | number>): string;
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