/**
 * i18n — lightweight pass-through translation module.
 *
 * English keys are used as-is (the key IS the English text).
 * Additional languages can be registered at runtime via `registerLocale()`.
 */
export type TranslateFn = (key: string) => string;
export declare function registerLocale(code: string, translations: Record<string, string>): void;
/**
 * Create a translate function for a given locale.
 * For "en" (or when no locale pack is registered), the key itself is the English text.
 */
export declare function createT(locale?: string): TranslateFn;
/**
 * Detect the best locale from the browser environment.
 */
export declare function detectLanguage(): string;
export declare const SUPPORTED_LOCALES: string[];
export declare const LOCALE_LABELS: Record<string, string>;
export declare const TRANSLATION_KEYS: string[];