Sumerian, the language of the folks who invented writing, which is just one of the things used to attest to the age of Sanskrit, is older than that.
Current research suggests it and the core language behind the Finno-Ugric subgroup and possibly a different core language behind the Sa'ami languages is of Dravidian origin.
It'll take a lot more work to trick that out.
I know Sanskrit texts have some stories of events and conditions that could have existed ONLY in the Ice Age, but we don't really know the original language ~ maybe someday, but all these languages as they existed independent of writing in ancient times may well be older than dirt but without writing we do not know.
Languages disappear all the time anyway.
Now, about the Brits and Moslems telling lies about HIndu India, sure ~ they do that even today. But the Portuguese who were there quite a bit earlier tell the same stories.
I accept what the Vedas say about the history of the world, not historians with axes to grind and mistakes in understanding. The Portuguese were butchers when they came to Goa, btw.