title: Rails + Devise: Missing my_sessions translations
body: <p>Using Devise, I created my own controllers to override the default Devise::XxxController. For example:</p>
  
  <pre><code>class Devise::MySessionsController &lt; Devise::SessionsController
  
      ...
  
  end
  </code></pre>
  
  <p>I inserted all the rewrited Devise controllers in a new folder <code>controllers/devise/</code>, and I added the corresponding namespaces in <code>routes.rb</code></p>
  
  <p>Everything is OK, except flash messages, which tells (for example):</p>
  
  <p><code>translation missing: en.devise.my_sessions.user.signed_id</code></p>
  
  <p>Any idea how to get (again) devise messages?</p>
  
  <p>Thanks in advance.</p>