/**
 * Common locales with metadata
 * @defaultValue
 * ```ts
 * {
 *   en: { code: 'en', name: 'English', nativeName: 'English', direction: 'ltr' },
 *   'en-US': {
 *     code: 'en-US',
 *     name: 'English (US)',
 *     nativeName: 'English (US)',
 *     direction: 'ltr',
 *     region: 'US'
 *   },
 *   'en-GB': {
 *     code: 'en-GB',
 *     name: 'English (UK)',
 *     nativeName: 'English (UK)',
 *     direction: 'ltr',
 *     region: 'GB'
 *   },
 *   es: { code: 'es', name: 'Spanish', nativeName: 'Espa\u00f1ol', direction: 'ltr' },
 *   fr: { code: 'fr', name: 'French', nativeName: 'Fran\u00e7ais', direction: 'ltr' },
 *   de: { code: 'de', name: 'German', nativeName: 'Deutsch', direction: 'ltr' },
 *   it: { code: 'it', name: 'Italian', nativeName: 'Italiano', direction: 'ltr' },
 *   pt: {
 *     code: 'pt',
 *     name: 'Portuguese',
 *     nativeName: 'Portugu\u00eas',
 *     direction: 'ltr'
 *   },
 *   'pt-BR': {
 *     code: 'pt-BR',
 *     name: 'Portuguese (Brazil)',
 *     nativeName: 'Portugu\u00eas (Brasil)',
 *     direction: 'ltr',
 *     region: 'BR'
 *   },
 *   zh: { code: 'zh', name: 'Chinese', nativeName: '\u4e2d\u6587', direction: 'ltr' },
 *   'zh-CN': {
 *     code: 'zh-CN',
 *     name: 'Chinese (Simplified)',
 *     nativeName: '\u7b80\u4f53\u4e2d\u6587',
 *     direction: 'ltr',
 *     region: 'CN'
 *   },
 *   'zh-TW': {
 *     code: 'zh-TW',
 *     name: 'Chinese (Traditional)',
 *     nativeName: '\u7e41\u9ad4\u4e2d\u6587',
 *     direction: 'ltr',
 *     region: 'TW'
 *   },
 *   ja: {
 *     code: 'ja',
 *     name: 'Japanese',
 *     nativeName: '\u65e5\u672c\u8a9e',
 *     direction: 'ltr'
 *   },
 *   ko: {
 *     code: 'ko',
 *     name: 'Korean',
 *     nativeName: '\ud55c\uad6d\uc5b4',
 *     direction: 'ltr'
 *   },
 *   ar: {
 *     code: 'ar',
 *     name: 'Arabic',
 *     nativeName: '\u0627\u0644\u0639\u0631\u0628\u064a\u0629',
 *     direction: 'rtl'
 *   },
 *   he: {
 *     code: 'he',
 *     name: 'Hebrew',
 *     nativeName: '\u05e2\u05d1\u05e8\u05d9\u05ea',
 *     direction: 'rtl'
 *   },
 *   ru: {
 *     code: 'ru',
 *     name: 'Russian',
 *     nativeName: '\u0420\u0443\u0441\u0441\u043a\u0438\u0439',
 *     direction: 'ltr'
 *   },
 *   nl: { code: 'nl', name: 'Dutch', nativeName: 'Nederlands', direction: 'ltr' },
 *   pl: { code: 'pl', name: 'Polish', nativeName: 'Polski', direction: 'ltr' },
 *   tr: {
 *     code: 'tr',
 *     name: 'Turkish',
 *     nativeName: 'T\u00fcrk\u00e7e',
 *     direction: 'ltr'
 *   },
 *   vi: {
 *     code: 'vi',
 *     name: 'Vietnamese',
 *     nativeName: 'Ti\u1ebfng Vi\u1ec7t',
 *     direction: 'ltr'
 *   },
 *   th: { code: 'th', name: 'Thai', nativeName: '\u0e44\u0e17\u0e22', direction: 'ltr' },
 *   hi: {
 *     code: 'hi',
 *     name: 'Hindi',
 *     nativeName: '\u0939\u093f\u0928\u094d\u0926\u0940',
 *     direction: 'ltr'
 *   }
 * }
 * ```
 */
export declare const LOCALE_INFO: Record<string, LocaleInfo>;
/**
 * Plural forms for a translation
 */
export declare interface PluralForms {
  zero?: string
  one: string
  two?: string
  few?: string
  many?: string
  other: string
}
/**
 * i18n configuration options
 */
export declare interface I18nConfig {
  locale: string
  fallbackLocale: string
  availableLocales?: string[]
  messages?: Translations
  missingHandler?: (locale: string, key: string) => string | undefined
  warnMissing?: boolean
  escapeValues?: boolean
  keySeparator?: string
  pluralSeparator?: string
  dateTimeFormats?: DateTimeFormats
  numberFormats?: NumberFormats
}
/**
 * i18n instance interface
 */
export declare interface I18nInstance {
  locale: string
  fallbackLocale: string
  availableLocales: string[]
  t: TranslateFunction
  tc: TranslatePluralFunction
  te: (key: string, locale?: string) => boolean
  tm: (key: string, locale?: string) => TranslationMessages | string | undefined
  setLocale: (locale: string) => void
  addTranslations: (locale: string, messages: TranslationMessages) => void
  d: (value: Date | number, format?: string) => string
  n: (value: number, format?: string) => string
}
/**
 * Locale metadata
 */
export declare interface LocaleInfo {
  code: string
  name: string
  nativeName: string
  direction: 'ltr' | 'rtl'
  region?: string
  script?: string
}
/**
 * i18n Type Definitions
 */
/**
 * Translation messages - can be nested objects or strings
 */
export type TranslationMessages = {
  [key: string]: string | TranslationMessages
}
/**
 * All translations keyed by locale
 */
export type Translations = {
  [locale: string]: TranslationMessages
}
/**
 * Interpolation values for translations
 */
export type InterpolationValues = Record<string, string | number | boolean | null | undefined>;
/**
 * Date/time format configurations per locale
 */
export type DateTimeFormats = {
  [locale: string]: {
    [formatName: string]: Intl.DateTimeFormatOptions
  }
}
/**
 * Number format configurations per locale
 */
export type NumberFormats = {
  [locale: string]: {
    [formatName: string]: Intl.NumberFormatOptions
  }
}
/**
 * Translation function
 */
export type TranslateFunction = (
  key: string,
  values?: InterpolationValues,
  locale?: string,
) => string;
/**
 * Plural translation function
 */
export type TranslatePluralFunction = (
  key: string,
  count: number,
  values?: InterpolationValues,
  locale?: string,
) => string;