/**
 * Universal load function for i18n (+layout.ts)
 * Handles both server and client-side initialization
 */
import type { I18nInstance } from '../core/types.js';
/**
 * Universal load function for i18n
 * Use this in your +layout.ts file
 *
 * @param i18n - The i18n instance
 * @param data - Data from parent layout (server data)
 * @param url - Optional URL for pathname detection
 * @param options - Configuration options
 */
export declare function loadI18nUniversal<T = I18nInstance>(i18n: T & Pick<I18nInstance, 'locale' | 'locales' | 'setLocale'>, data: any, url?: URL | {
    pathname: string;
}, options?: {
    storageKey?: string;
    defaultLocale?: string;
    namespace?: string;
}): Promise<any>;
/**
 * Backward compatible universal load function
 * @deprecated Use loadI18nUniversal instead
 */
export declare function i18nUniversalLoad<T = I18nInstance>(i18n: T & Pick<I18nInstance, 'locale' | 'locales' | 'setLocale'>, data: any, browser: boolean, options?: {
    storageKey?: string;
    defaultLocale?: string;
}): Promise<any>;