Sanskrit is like Latin, nobody actually speaks it now. Actually the language I speak is very close to Sanskrit, closer than Hindi. Thanks in a large part to Chandragupta's grandson Asoka, who is credited with spreading Buddhism to most of the Buddhist world...and with it language. Monks were the scholars and teachers until colonial times.
What does Trajan speak in Civ VI? (Of course there are a ton of classicists who may be able to speak it).