I want to add in my `MyType` form `locale` field, so I put:

```
$builder->add('locale', 'locale', array(
  'label'       => 'user.locale',
  'required'    => true,
));

```

However it rendered me a whole list of available locales because default `choices` array for this type is:

```
'choices' => Intl::getLocaleBundle()->getLocaleNames()

```

I would like to display only `en`, `de` and `pl`. How can I limit the output to those languages ?

The best solution would be with defining this list in `config.yml`.