title: Orbeon 4.0.0.m6 : How to set default language for form builder?
body: <p>I am in the progress of upgrading my code from Orbeon 3.9 to 4.0.0.m6 . I want to be the form builder in German by default, for 3.9 I deleted all translations in <code>src/resources/apps/fr/i18n/resources.xml</code> and <code>src/resources/forms/orbeon/builder/form/resources.xml</code> and added German translations. This doesn't seem to work in 4.0 anymore, it complains about missing translations (I see an error message like <code>empty sequence is not allowed for format-message</code>).</p>
  
  <p>I tried to add the following line to my properties, but that doesn't help either:</p>
  
  <pre><code>&lt;property as="xs:string" name="oxf.fr.default-language.*.*" value="de"/&gt;
  &lt;property as="xs:string" name="oxf.fr.available-languages.*.*" value="de"/&gt;
  </code></pre>
  
  <p>As far as I see the form builder still tries to look for English translations, although only German translations are present. What can I do?</p>