I translated the page hidden link with WPML with the automatic translation.
Most things are working now.
But the static things that are built with the DIVI Theme Builder for a Custom Post Type are not translated.
I tried a lot of options but can´t find the right one.
For example:
STIPENDIUM BEANTRAGEN
SPONSOR WERDEN
WORKSHOP ANFRAGEN
TERMIN FÜR EINZELCOACHING BUCHEN
As I see those words are part of a page builder module which may need to be recognized by WPML. The above mentioned guide explains about it. You can add that XML in WPML -> Settings -> Custom XML Configurations.
And after registering, make a small change to the page having that module, in default language, save and update the translation.