The Difference Between Vedic and Vedic Languages

The language Sanskrit is very, very closely related to old Iranian namely of estan. In the invest in language, deva means demon, but in Sanskrit it means God. And then you have the asuras in Sanskrit a who is in a vest and again underwent a similar shift. So I'm not sure if this is semantic just related, but what I do sometimes is I think of borrowing between languages,. But not perfect borrowing like maybe there were people who spoke language a coming over to let people who speak language be territory.