[Решено] Menu translation no longer works

Background of the issue:
I am trying to maintain the existing menu configuration that has worked perfectly for many months. The issue can be seen on this page: скрытая ссылка

Symptoms:
The existing menu translation should be displayed on the EN page, but only the German menu is displayed in both language versions. The English translation is no longer displayed.

Questions:
Why is the English menu translation no longer displayed?
How can I restore the menu translation to show correctly on the EN page?