Paperclip + i18n

Hi. I have a problem with localization messages in paperclip.
In my locale (en.yml) file I defined next code
en
  paperclip:
    errors:
      attachment:
        size: "message"
        content_type: "message"
        presence: "message"
But this solution does not work.
I found another solution -
validates_attachment_presence :file, :message => 'Some message'
But this solution is not very good.
How to make error message multi-language?