I believe we have a topic about this already somewhere around... Can't quite remember where though.
The Quarian language, Khelish, does not have any real grammar og context to it unfortunately. I love languages myself, and I would be overjoyed if they actually bothered making something like this, but I doubt Tolkien works for Bioware, and thus it's very unlikely that we will ever get what we want.
I've tried making sense out of the few words we have, but the composition of the language is extremely difficult to piece apart and make sense of. The reason for this is because, like I said, the grammar doesn't really exist.
For now, we will have to sate our hunger with the simple translations of a few words:
nedas — nowhere
tasi — no-one
vas [ship-name] — crew of
nar [ship-name] — child of
keelah — "By the homeworld"
keelah se'lai — "By the homeworld I hope to see one day."
bosh'tet — curse/insult, likely being relative to "son-of-a-bitch" or "bastard".
geth — "Servant of the People"
Rannoch — "walled garden"