[Geschlossen] Translations not loading on front-end despite being completed

Background of the issue:
I am trying to display translated content on the website using WPML's Translation Editor. The translations have been completed and marked as complete. The translated content appears correctly in the backend. The issue can be seen on this page: versteckter Link.

Symptoms:
The translated version of the page does not show up on the front-end. Instead, the original (default) language version is displayed, or the translated version does not load at all. The language switcher changes the URL, but the content remains in the default language. This issue affects multiple pages. I have tried clearing the cache and re-saving the translations, but it didn’t help.

Questions:
Why are the translations not loading on the front-end despite being completed?
What steps can I take to ensure the translated content appears correctly on the front-end?