Menu items do not translate

Hi,

I set up a very basic 2-language drupal site (German/English) identified by path structure (example.com/en/... vs. example.com/de/...) and entered some content. It flips nicely between English and German, that is, the content of the nodes does, the menu items (primary links) always stay in one language.

On entering a translated version of a node, I open the menu entry and translate the menu entry name, but to no avail.

What do I do wrong?