Actually, if you were studying the Baltimore Catechism:
Q. 566. Why does the Church use the Latin language instead of the national language of its children?
A. The Church uses the Latin language instead of the national language of its children:
To avoid the danger of changing any part of its teaching in using different languages;
That all its rulers may be perfectly united and understood in their communications;
To show that the Church is not an institute of any particular nation, but the guide of all nations.
As you know, all language change with usage and the passing of time. Not so with Latin, It is a language that cannot change because it is not being used as a language by anyone.
This is not actually true. When Latin was used extensively by illiterates and half-literates in the West by the 3rd century there had developed a Vulgar Latin, from which the modern Romance languages were derived. (These have either changed or been morphed into what we see today.) The Latin (the grammar, the endings, and the vocabulary) the Church adopted had been codified by Cicero and other Roman classicists and then Christianized by the early Church (for example, “oratio” become prayer instead of speech, etc.) Thus Classic Latin becomes distinguished from Ecclesiastical Latin but both of them have survived thanks to the hard work of monks and/or scholars through almost two millennia.
The revised Mass that we will begin to use on Nov.27.is an excellent example, they went back to the Latin Mass to correct some wording and to clarify some wording in the Mass. It all goes back to the Vulgate Bible that St.Gerome translated from Greek.
It could be said that St. Jerome consolidated the older (poor quality) Latin Vulgate, the Greek Vulgate, Hebrew, and some of the work that he had available at the time. The Greek itself was a translation.