[Решено] Translated text not showing in front end

Background of the issue:
I have translated a page from English to German. The title appears in German, but the rest of the content remains in English. The issue can be seen on this page: скрытая ссылка

Symptoms:
The complete translation in German was expected, but instead, the title is in English and the rest of the page content is in English.

Questions:
Why is the translated text not showing in the front end?