class CopyTunerClient::I18nBackend

def default(locale, object, subject, options = {})
  content = super(locale, object, subject, options)
  if content.respond_to?(:to_str)
    parts = I18n.normalize_keys(locale, object, options[:scope], options[:separator])
    key = parts.join('.')
    cache[key] = content.to_str
  end
  content
end