Hello, my name is Linus Torvalds and I pronounce Linux as Leenucks.
This goes far outside of just the Latin-derived languages. We use the Latin alphabet, after all. So if the language can be written with this alphabet somehow (even if the locals don't usually use it), there's a pretty good chance that you should assume they use the Latin vowels, too.
No guarantees, but I've managed to surprise more than a few people by pronouncing things correctly.