BTW: The term “Latin Mass” is a bit outdated, or off-the-mark.
The Typical Edition of the Novus Ordo is in Latin, and every priest has always had the unlimited right to celebrate the NO in Latin.
The terms BXVI used, of course, are Ordinary Form and Extraordinary Form.
I think most people know that when one says “Latin Mass” they are speaking of the pre-Vatican II Mass.