title: locale django model Float Field to comma separated
body: <p>is there any simple way to make a models.FloatField comma(not dot) separated? Without defining new format kind?</p>
  
  <p>My settings.py are already localized, but still accept only dots</p>
  
  <p><code>
  LANGUAGE_CODE = 'de-De', <br />
  USE_I18N = True,<br />
  USE_L10N = True
  </code></p>