/**
 * LombokTableSheet I18n Manager
 * Handles language switching, string localization, pluralization, number/date formatting
 */
import type { Language, I18nOptions, LanguageCatalog } from './types.js';
type StringKey = string;
export declare class I18nManager {
    private currentLanguage;
    private fallbackLanguage;
    private strings;
    private options;
    constructor(options?: Partial<I18nOptions>);
    /**
     * Register a language with its translations
     */
    registerLanguage(lang: Language, strings: LanguageCatalog): void;
    /**
     * Set current active language
     */
    setLanguage(lang: Language): boolean;
    /**
     * Get current active language
     */
    getLanguage(): Language;
    /**
     * Get list of available languages
     */
    getAvailableLanguages(): Language[];
    /**
     * Get a translated string
     * @param key Dot-notation key path (e.g., 'ui.ok', 'messages.welcome')
     * @param variables Optional replacement variables for %key patterns
     */
    t(key: StringKey, variables?: Record<string, any>): string;
    /**
     * Get a pluralized string
     * @param key Dot-notation key to plurals object
     * @param count Number to determine plural form
     * @param variables Optional replacement variables
     */
    tp(key: StringKey, count: number, variables?: Record<string, any>): string;
    /**
     * Format a number according to current language
     */
    formatNumber(value: number, decimals?: number): string;
    /**
     * Format a date according to current language
     */
    formatDate(date: Date, format?: string): string;
    /**
     * Format a time according to current language
     */
    formatTime(date: Date, format?: string): string;
    /**
     * Get language metadata
     */
    getLanguageInfo(lang?: Language): {
        code: Language;
        name: string;
        nPlurals: number;
    };
    /**
     * Internal: Get value from nested object using dot notation
     */
    private getNestedValue;
    /**
     * Internal: Get plural form index based on count
     * English/Spanish/French/German pluralization:
     *   0: zero form (count === 0)
     *   1: singular form (count === 1)
     *   2: plural form (count > 1)
     */
    private getPluralForm;
    /**
     * Internal: Validate language code
     */
    private isValidLanguage;
}
export declare function createI18n(options?: Partial<I18nOptions>): I18nManager;
export declare function getI18n(): I18nManager;
export {};