[Risolto] Something wrong as I cannot translate properly with the new translation feature

Morning,
We have been trying to figure out what is going on for weeks.
We exported some xliff and translated them but the pages do not appear fully translated, only partially.
Could you please help me out and let me know how to export ALL xliff for all pages, and import them to have the WHOLE site translated in English?
Thanks in advance.
Regards,
Rosario