title: LIst of all region format
body: <p>i'm be able to retrieve the region format of the user, ad example it_IT with this code</p>
  
  <pre><code>[NSLocale currentLocale] objectForKey:NSLocaleIdentifier];
  </code></pre>
  
  <p>is it possible have the complete list of these identifier?</p>
  
  <pre><code>(it_IT, de_DE, de_AT,....)
  </code></pre>
  
  <p>Thanks</p>