import i18next, { type i18n as I18nInstance } from 'i18next';
/** Resolve a translation language without changing the host's formatting tag. */
export declare function resolveUiLanguage(code: string): string | undefined;
/**
 * Merge a complete kit bundle, keeping host overrides. Regional tags share
 * their base translation bundle; the instance language remains untouched.
 * Lazy-import failures reject and can be retried.
 */
export declare function loadLocale(code: string, instance?: I18nInstance): Promise<void>;
/**
 * Await after host init(), before rendering. Also supports createInstance()
 * hosts: pass this same instance to I18nextProvider. Never reinitialises a host.
 */
export declare function initialiseUiI18n(instance?: I18nInstance): Promise<void>;
/** Load the requested bundle before changing language. */
export declare function setLocale(code: string, instance?: I18nInstance): Promise<void>;
/** Load all 18 bundles on a singleton or provider instance. */
export declare function loadAllLocales(instance?: I18nInstance): Promise<void>;
export default i18next;
export { LOCALES_WITH_BUNDLES } from './supported-locales';
export { registerUiBundle } from './registerUiBundle';
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