I mean this:
the site has 2+ languages: if I am to choose a related post through a related field I should get only posts in the current language.
Exactly that is not the case. I get the posts in all languages.
To be more precise: Let’s say the site is currently in English: For some reason I want to relate to the “About” page. If that About page exists in several languages I get all its versions (the English but also the German one and so on.) as options to choose. I definitely should be getting only the version in the current language.