[Resuelto] Advanced translator issue

Background of the issue:
I am trying to: In the website raypa.com, the advanced translator stopped working correctly. When we enter the enlace oculto editor, only a really small amount of the texts is available for translation. Link to a page where the issue can be seen: enlace oculto

Symptoms:
Only a small amount of the texts are visible for translation. See here: enlace oculto It's a long post (enlace oculto) but most of the text is not available for translation...
and this video our French translator sent us (it's been translated into English via AI): enlace oculto

Questions:
Why is only a small amount of the texts available for translation in the advanced translator?
How can I make the whole texts available for translation?