A large fraction of Indian children will be illiterate in these "thriving" languages in the coming decades, with "zero" monetary loss. Not living is death, and they haven't been alive for a long time - I can neither get any Govt. services in my mother tongues, nor can get the laws done by the colonial state in Delhi.
A zombie is not alive IMO. If Indians wish to parlay their tongues for money, it's upto them. I for one will not deceive myself. We are going to be part of the borg that is the Anglosphere in less than 3-4 generations.