module I18n::Backend::ActiveRecord::Missing

def store_default_translation(locale, key, interpolations)
  translation = ActiveRecord::Translation.new :locale => locale.to_s, :key => key
  translation.interpolations = interpolations
  translation.save
end

def store_default_translations(locale, key, options = {})
  count, scope, default, separator = options.values_at(:count, *Base::RESERVED_KEYS)
  separator ||= I18n.default_separator
  keys = I18n.send(:normalize_translation_keys, locale, key, scope, separator)[1..-1]
  key = keys.join(separator || I18n.default_separator)
  unless ActiveRecord::Translation.locale(locale).lookup(key, separator).exists?
    interpolations = options.reject { |name, value| Base::RESERVED_KEYS.include?(name) }.keys
    keys = count ? I18n.t('i18n.plural_keys', :locale => locale).map { |k| [key, k].join(separator) } : [key]
    keys.each { |key| store_default_translation(locale, key, interpolations) } 
  end
end

def translate(locale, key, options = {})
  super
  rescue I18n::MissingTranslationData => e
    self.store_default_translations(locale, key, options)
    raise e
end