In what countries is Italian the primary language?

Italian is the primary language in the following countries:

* Italy: This is the obvious one! Italian is the official language of Italy.

* San Marino: This small, independent microstate, completely surrounded by Italy, also has Italian as its official language.

* Vatican City: The tiny independent city-state, home to the Vatican, has Italian as its official language.

While Italian is spoken by significant populations in other countries like Switzerland, Slovenia, Croatia, Argentina, Uruguay, and the USA, it is not their primary language.