User blog comment:Ralok/Hanar (appearence)/@comment-730941-20100430012149

One codex entry in the original ME says that translation computers are so small that they can be put in jewellery, clothing etc. It's not too hard to imagine that hanar could have them under their skin or something. Besides, as they communicate through bioluminescence the translator would need to pick up the light pulses exactly to work out what they were saying...

As for their antigravity, perhaps it's an internal implant that the hanar can release when it wants to... we definitely haven't seen anything on the outside that looks like one.