Italians are usually very understanding with foreigners who do not know, but respect and show interest in Italian customs and manners.
The golden rule is to ask politely and apologise smilingly. Let your Italian counterparts know how you would behave in a similar situation in your own culture (without implying yours is better than theirs). Here are some do’s and don’ts when interacting with Italians:
Inform your host early of food taboos and dietary restrictions, if you are invited to a party. (An allergy is always a good excuse, and never questioned!)
Sit up straight when eating. Keep your elbows close to your body and ...