Direct link for localized user guides not working

Hey folks,

there seems to be an issue when requesting the localized vrersion of a user guide page. In Drupal Core there is the following link on the front page:

https://www.drupal.org/docs/user_guide/en/index.html

in German that has to be https://www.drupal.org/docs/user_guide/de/index.html

The second link doesn't work if you click on it in Drupal Core

It only works on d.o when you go to

Resources > User Guide > German

May be this is a redirecting or rewriting issue and so all user guides in different languages than English may be affected