I hold that when you do, you say “Maharatotai nevareches.”
That’s not even proper Hebrew grammar!!!!!!!! It would still be “nevareich!” The person leading the bensching is calling out, “Hey guys, we’re gonna bensch!” The word “Nevareich” is correct for male or female “we will bensch.” (I am NOT going to even begin to address the Maharatotai, as Rabosai does not mean “rabbis,” in the context of the sentence, so therefore the maharat issue is not shayach. You’re welcome.