It’s tough to find a name that works in every language. I’m sure they know this isn’t supposed to be about death, it’s supposed to be about the beyond, a perfect world that exists somewhere beyond our own physical reality. The two concepts are obviously unrelated. 
(Just for the record, in classical Greek μετά can mean after or beyond, but in lots of contexts it also means among, between, in the middle of, and so on. Which is just to say that despite Zuckerberg pointing to his love of the classics, I am pretty sure he was actually inspired by the English word meta.)
