import type { i18n as I18n } from 'i18next';
/** Where LocalePicker and HeaderSettings save a language the visitor
 *  picked: `LOCALE_STORAGE_KEY` in locale-picker.tsx, copied so the error
 *  page does not bundle the picker. */
export declare const SAVED_LOCALE_KEY = "alfadocs-ui.locale";
/** Used when nothing else names a language the kit ships. */
export declare const ERROR_PAGE_FALLBACK_LOCALE = "it";
export interface ErrorPageLocaleSources {
    /** Host-supplied locale. Always wins when the kit ships it. */
    locale?: string;
    /** True when `<html lang>` is only the site default, not the visitor's
     *  language: for example an error raised before routing read it. */
    hostLocaleIsDefault?: boolean;
    /** Test seams; the browser values are read when omitted. */
    saved?: string | null;
    browser?: readonly string[];
    document?: string;
}
/**
 * The language to show an error in. First match wins:
 * 1. the `locale` prop;
 * 2. the language the visitor picked before in the kit;
 * 3. the browser's languages, in order;
 * 4. `<html lang>`, unless the host says it is only its default;
 * 5. Italian.
 * Only languages the kit ships count at each step.
 */
export declare function resolveErrorPageLocale(sources?: ErrorPageLocaleSources): string;
/** Fetches the kit's bundle for a language without changing the host's
 *  active language. Rejects when the bundle cannot load. */
export declare const loadErrorPageLocale: (language: string, instance: I18n) => Promise<void>;
//# sourceMappingURL=error-page-locale.d.ts.map