[Fermé] Translations not showing on front end, which had worked previously

To confirm firstly, the pages we are having issues with have been correct for many months, but suddenly are presenting the following issue;

Please see the following example page;

lien caché

you can see the english text is correctly displaying at the top of the page.

This page was translated into Germany around 6 months ago, and was displaying in German. However, suddenly when we look at the German version now, it displays in English;

lien caché

The german translation is correctly set in the dashboard.

lien caché

As mentioned, this problem has suddenly appeared. Some categories are fine, but some are presenting this problem, although they are all set in the same way.

Please can you advise?