"I am not suggesting that Sanskrit be pushed aggressively, but only that the advantage of this great classical language, which is understood by more people in India than Greek and Latin in modern Europe, must be appreciated and utilized. Further, in the Devanagari script, there exists a possible common script for other Indian languages, though one cannot be too optimistic about the practicability of adopting it in view of the tenacious attachment of people to their own particular scripts. Another link language which flourished in India was Persian which in its interplay with Sanskrit and Arabic produced the great modern language, Urdu. Here again, beginning as a court or camp language, it blossomed into a modern tongue of the people, linking India linguistically with the Arab world."
January 1, 1970
https://en.wikiquote.org/wiki/Languages_of_India