import type { I18nConfig, I18nInstance, TranslationSchema, InterpolationParams, LanguageMeta, TranslationFile } from './types.js';
export declare class I18nStore implements I18nInstance {
    private config;
    private translations;
    private languageMeta;
    private currentLocale;
    private loading;
    private namespacePrefix;
    private validationErrors;
    private availableLocales;
    private isMainInstance;
    private clientLoadCalled;
    private localeRestored;
    get locale(): string;
    get locales(): string[];
    get isLoading(): boolean;
    get errors(): Record<string, string[]>;
    get meta(): Record<string, LanguageMeta>;
    constructor(config: I18nConfig);
    /**
     * Set up locale synchronization with global state
     */
    private setupLocaleSync;
    /**
     * Set locale synchronously without persistence (for initial hydration)
     */
    setLocaleSync(locale: string): void;
    setLocale(locale: string): Promise<void>;
    t: (key: string, params?: InterpolationParams) => string;
    /**
     * Load translations synchronously (for built-in translations)
     * This is used to prevent flash during hydration
     */
    loadLanguageSync(locale: string, translations: TranslationSchema | TranslationFile): void;
    loadLanguage(locale: string, source?: string | TranslationSchema | TranslationFile): Promise<void>;
    validateTranslations(locale: string, schema?: TranslationSchema): boolean;
    formatDate(date: Date | number | string, preset?: string): string;
    formatTime(date: Date | number | string, preset?: string): string;
    formatNumber(num: number, preset?: string): string;
    formatCurrency(num: number, currency?: string): string;
    formatRelativeTime(value: number, unit: Intl.RelativeTimeFormatUnit): string;
    formatList(items: string[], type?: 'conjunction' | 'disjunction' | 'unit'): string;
    detectBrowserLanguage(): string | null;
    getNamespace(): string | undefined;
    canShowValidationPopup(): boolean;
    setActiveValidationPopup(active: boolean): void;
    /**
     * Server-side method to load translations and determine best locale
     * This method is for SSR and should be called in +layout.server.ts
     *
     * @param cookies SvelteKit cookies object
     * @returns The best locale to use based on cookie and available translations
     */
    serverLoad(cookies: any): Promise<string>;
    /**
     * Load registered translations synchronously (for SSR)
     * This ensures translations are available during server-side rendering
     */
    private loadRegisteredTranslations;
    /**
     * Revalidate all loaded translations against the default locale
     * This is needed when translations are loaded out of order
     *
     * Note: Uses config.defaultLocale which can be any language (not just 'en')
     * This allows users to use Chinese, Japanese, or any other language as their reference
     */
    private revalidateAllTranslations;
    /**
     * Client-side method to automatically load all available languages
     * This method handles:
     * - Checking if languages are already loaded
     * - Loading all available languages
     * - Setting fallback locale if needed
     *
     * @param options Optional configuration for loading
     * @returns Promise that resolves when loading is complete
     */
    clientLoad(options?: {
        initialLocale?: string;
        skipLocaleRestore?: boolean;
    }): Promise<void>;
}
/**
 * Clear all instances (for testing)
 */
export declare function clearAllInstances(): void;
export declare function setupI18n(config: I18nConfig): I18nInstance;
export declare function getI18n(namespace?: string): I18nInstance;
export declare function resetI18nForTesting(): void;