Problem with translation of login widget

Hi,

I want to use UAM for a multilingual page (german and english). I only need it for the german part. I have the translation files and the terms are translated. When I put the login widget into a sidebar the terms are shown in english. I tried to change the language setting for the widget from all languages to german. That does not change anything. The backend is translated properly.

There are no errors in the error log.

What can I do?

Regards
Brigitta