import type { LocaleDefinition } from '..';
/**
 * Merges the given locales into one locale.
 * The locales are merged in the order they are given.
 * The first locale that provides an entry for a category will be used for that.
 * Mutating the category entries in the returned locale will also mutate the entries in the respective source locale.
 *
 * @param locales The locales to merge.
 *
 * @returns The newly merged locale.
 *
 * @example
 * const de_CH_with_fallbacks = mergeLocales([ de_CH, de, en ]);
 *
 * @since 8.0.0
 */
export declare function mergeLocales(locales: LocaleDefinition[]): LocaleDefinition;