I'm trying to use content elements in Isotope Product (similar to what is described here).
I managed to do it, now my Products have content elements, like in Article module.

Now, how do I use changelanguage backend feature with that? I have two page trees in different languages with identical structure, they are properly connected by language, and Changelanguage module works correctly in Frontend, but doesn't appear in the Backend.

I just need some hints, where to look further.