[quote=@BrokenPromise]
Yes, in our world, languages are named after the places where we live. But so too are the people who live there. Like how you'll find Germans in Germany, Africans in Africa, and Mexicans in Mexico. Yes, Americans speak English, but that's because the settlers that came here were from England. So if your elves live in Elveguard, who's to say their Elvin language isn't named after where they live? Also Latin was originally spoken in Latium, which is a region in Italy. So maybe the full story is that the elves and their language is named after a small region in Theodmon called Elvinto?

Clearly the name of a language isn't always super obvious. If there's an Elvin language, and there are elves, then there is probably a place, however small, with a like name. It just might not be pivotal to the story. But who really knows? 

[/quote]

Wow I like that answer! For such a great response, you deserve a bowl of Velveta shells 'n cheese!