As has already been pointed out, the Vatican uses a bastardized version of Latin as their official language. Also, it's a language that is used in various scientific areas (where do you think Homo Sapiens comes from?). Also it's used in legal terms (pro bono, for example). Also it's a highly historic language, one that most people on the planet will have heard of. Also it's the predecessor of many European languages. English uses plenty of Latin-based words and phrases.It's a dead language that most people don't understand.
And if your complaint is that many people won't understand it then we should rule out any non-English names. After all, not many people would understand them, either.