"lIboQ'a' tera'nganpu'? HISlaH. nuboQ."
Translation:Did the Terrans assist you? Yes. They assisted us.
There is a Klingon word Human which means a human (regardless of which planet he's from), so translating tera'ngan as "human" is a little imprecise -- it basically means someone from Earth: a Terran or an earthling.
So the best translation for tera'ngan is "Terran" (and for tera'nganpu', "Terrans"), but we often accept "human(s)" as well.
If it wasn't accepted here, you can report it so that it can be added.