title: Localization of custom keycloak login theme
body: <p>I am implementing a custom login page for keycloak (version 2.5), by following <a href="https://keycloak.gitbooks.io/server-developer-guide/content/topics/themes.html" rel="noreferrer">this</a> guide. I added my own custom styling, now I am trying to add the Dutch locale. Currently no Dutch locale is provided, so I provided following properties files:</p>
  
  <ul>
  <li><code>themes/mytheme/login/messages/messages_en.properties</code></li>
  <li><code>themes/mytheme/account/messages/messages_en.properties</code></li>
  <li><code>themes/mytheme/email/messages/messages_en.properties</code></li>
  </ul>
  
  <p>with the <code>locale_nl=Nederlands</code> property. After that I added the <code>messages_nl.properties</code> files with the translation strings. </p>
  
  <p>Next I added the <code>locales=en,nl,de</code> property to following files:</p>
  
  <ul>
  <li><code>themes/mytheme/login/messages/theme.properties</code></li>
  <li><code>themes/mytheme/account/messages/theme.properties</code></li>
  <li><code>themes/mytheme/email/messages/theme.properties</code></li>
  </ul>
  
  <p>There is only one thing left to do: add the Dutch locale in the admin console. But I can't select the <code>NL</code> locale after I enabled internationalization. I can only select the English and German locale, my just created Dutch locale is not available:</p>
  
  <p><a href="https://i.stack.imgur.com/Y5Fvp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Y5Fvp.png" alt="enter image description here"></a></p>
  
  <p>According to <a href="http://metalop.com/2015/06/11/multilingual-support-and-adding-custom-locales-in-keycloak-1-2-0/" rel="noreferrer">Multilingual support and adding custom Locales in Keycloak</a>, I should be able to add my own locale by just typing the locale and hitting 'enter', but that does not do anything.</p>
  
  <p>I am missing a step here?</p>