Leo XIV and the vernacular Mass

An American pope, how amazing! I wonder what Trump will make of him -- and vice versa! But mostly I wonder, as the agnostic son of two Irish Catholics, what language he'll use while saying Mass. I assume he knows Latin, though he was born after the church adopted the vernacular Mass, and he must be fluent in Spanish since he went to Peru as a young missionary and more recently served as a bishop there. Pope Francis brought him to Rome two years ago, so he likely speaks Italian as well. Truly, a man for our age!