Hi Zappamano,
You can try the same thing, instead of using the new theme, using the old one, if you have a copy of it.
I am also Italian. The problem is real. If you want to temporarily solve the problem, you must delete the entire folder “enfold” and then upload via FTP the new theme. The problem with the translations and with the selector remains, but the footer appears again. it is urgent a new update, however.