When you Edit a post and make a relatioship using the ID of posts in other languages, it works perfectly. After saving the edition, if you edit again this post the relationships still remains.
However, if later you make a Quick Edit of this post and you modify it, the relationship is lost. In fact, if you edit the post you will see than no relationship exists which is annoying because you have to edit again and again.
Besides, in the Quick Edit all the categories are showed no matter what the language is. However in the Edit option these are filtered, so I suppose that Quick Edit hasn't been modified to work with this great plugin.
Thanks in advance!