[ninenot]

The liturgy was in Greek for several centuries before it was changed to Latin.

News to me. The Roman Rite was codified in roughly 600 AD by Gregory the Great and most of its elements were in place in Rome by 300AD.

And it was in LATIN in Rome.

[nika]

The official transition from Greek to Latin liturgy took place in the reign of Pope Damasus (366-384 AD). Take a look at Patrology by Johannes Quasten, Volume II, page 154. Reprinted by Christian Classics TM 1983.