Why not "should we?"
I would prefer to translate "Invitiamo le vostre fidanzate?" to "Should we invite your fiancees?" as well.
isn't "vostre" yours?
Yes, the translation is wrong, and the pronunciation of fidanzate weird.
Edit: Nevermind, the sentence has changed and the translation is ok now.
But girlfriends is plural so isn't vostre correct?
I guess the sentence was fixed, I don't remember what it was anymore.
vostre fidanzate is correct according to me
I wrote "let's invite your girl friends". It was marked wrong. I think it's correct, but can't be bothered to argue with Duolingo. "Andiamo" can mean "Let's go" (Let us go) and "Invitiamo" I think is the same.
Except it's a question.
You're right, I'm wrong. Thanks!