[Geschlossen] WPML shows the wrong menu

Background of the issue:
I am trying to fix an error where the language elements of the second language are not shown at all. I expected to see the same footer links on both the English and German pages. The issue can be seen at versteckter Link.

Symptoms:
On the German page, the footer is empty, although I translated all items with the WPML string translator. After the translation in Design - Menu did not work.

Questions:
Why are the translated menu items not appearing on the German page?
How can I ensure the footer links appear correctly in both languages?