Hi Georg,
the label should already be in German. Which version are you using?
Nevertheless here are two hints how to modify translations:
1. Updating/Adding new languages to the UI:
https://community.webcon.com/posts/post/translation-of-webcon-bps-portal-user-interface-content/102
I weren't in a situation where I needed this.
2. Translating Objects like Application, Reports fields:
https://community.webcon.com/posts/post/translation-tool/155
Easy way to mass update the translations or use it for spell checking. I transfer the translation column to word, do the spell check and copy it back.
Best regards,
Daniel