TIL that content for wikipedia pages changes per language. I clicked 'English' in the left pane hoping to learn more about what you are saying, but the English version does not have the 'En Europe' section. not so great. Thanks for your post
They are in fact entirely parallel Wikipedia encyclopedias written in different languages. Not only will articles have different information and be organised in a different way, whole families of related articles may be organised in different ways from one language to another.
This seems pretty reasonable seen for the whole encyclopedia, but I suppose if you assume that the language change option will just translate the page you're currently looking at then it's quite a surprise.