I am not able to use your superior.pot file in the right way. I am able to use PoEdit, I did create it_IT.po (and it_IT.mo file for sure), put it in the languages folder, but labels are not translated.
Which label are you talking about? Could you clarify it a bit more? Did you change the default language into your own language.
Go to dashbaord -> setting -> reading -> site language and select your language from dropdown list.