You keep putting different things that I did not state. I didnt not say Indo-Iranian branched out of "Armenian", I said "Ancient Armenian", there is a lot of difference in that. Please dont keep changing my words to confuse other readers. Secondly, those linguists who place the homeland of the Indo-Europeans (Aryans), in the Armenian Highlands, also made a language tree that shows Indo-Iranian branched out from "Ancient Armenian" (also known as Armeno-Aryan etc.). So here is your answer that you were not aware of. Yes, I will not explain about Armenian language to you