/**
 * LocaleField
 *
 * Picks one of a site's market locales. The options are the site's registry, so
 * a locale that isn't configured can't be typed in. Each market is searchable by
 * its native name, its English name, and its tag, so `Deutsch`, `German`, and
 * `de` all reach the same row.
 *
 * No locale is the field's empty state, not an option: the placeholder reads
 * `Unset` and clearing the field returns to it. Nothing is privileged as a
 * site's original language, so there is no locale to fall back to.
 */
import React from 'react';
export interface LocaleFieldOption {
    /** BCP-47 tag, e.g. `de-DE`. */
    tag: string;
    /** The locale's name in its own language, e.g. `Deutsch`. */
    native: string;
    /** The locale's name in English, e.g. `German`. */
    english: string;
}
export interface LocaleFieldProps {
    id: string;
    label: string;
    /** The site's configured markets. With none, the field does not render. */
    locales: LocaleFieldOption[];
    /** Receives the chosen tag, or null when the field is cleared. */
    onChange: (tag: string | null) => void;
    /** Shown under the field. Omit while the field is untouched. */
    message?: string;
    /**
     * Tag of a locale already settled elsewhere. Read once, as the option to
     * start on: the field owns its text from then on.
     */
    defaultValue?: string;
}
export declare function LocaleField({ id, label, locales, onChange, message, defaultValue, }: LocaleFieldProps): React.ReactElement | null;