Hi again,
Thank you for your answer. Ok i will try with duplicate also.. but the problem is still there so I can expect that the client will have some difficulty in translating. It would be ideal that you can completely solve the problem of incompatibility, but okay, I will not bother you :)
Thanks for a great theme and great support :)

Update: I managed to translate the pages, BUT the problem is still the same.

I managed to translate the pages by creating the blank page in second language and then by “Connect with translations” and then “Overwrite with english content” ..and everthing is ok in that case (except “Copy content from English” does not work ).