Hello Fabrizio,
If you would like to translate Profile Builder fields title into Italian go to Profile Builder -> Manage Fields -> Edit the field and change the title into Italian -> Save changes. That field title should be displayed in Italian in the Registration / Edit Profile forms.
If you would like to translate the whole plugin we’ve setup a new environment for making it really easy to translate Profile Builder in any language, as well as downloading the translation files.
Italian translation is already 67% complete, so it would be great if you could help and add your translated strings there, so that other users may benefit from them.
Then on the page bottom click Export and select the .po and then the .mo files.
You need to rename them: profile-builder-it_IT.mo and profile-builder-it_IT.po and place them in the Translation directory in the plugin.
Then in the WP back-end UI, under Settings go to Site Language and select Italian. This way all your Profile Builder strings will be in Italian.
We’ll also make sure to include all the translations updates in each plugin update.
Best regards,