window.i18n = {
  locale: null,

  translate: function(key, options) {
    key = String(key)
    if (!options || typeof(options) !== 'object') {
      options = {}
    }

    var no_translation = '[no translation for key: ' + key + ']'

    var locale = String(window.i18n.locale)
    var translations = window.i18n.translations[locale]
    if (typeof(translations) === 'undefined') return no_translation

    var translation = String(translations[key])
    if (typeof(translation) === 'undefined') return no_translation

    // TODO: apply options

    return translation
  },

  translations: {
    en: {
      Meanings: 'Meanings',
      Commentary: 'Commentary',
      Inflections: 'Inflections',
      'Usage examples': 'Usage examples',
    },
    ru: {
      Meanings: 'Значения',
      Commentary: 'Комментарий',
      Inflections: 'Формы слова',
      'Usage examples': 'Примеры употребления',
    },
  },
}