I think you dont know how ppl in India mock at each other's mother tongue. Hindi is the language that unifies multilingual India.
The issue was, that till not so long back the north Indians and south Indians were skeptical about moving out of their comfort zones, but now interstate migration has become very common owing to urbanization.
But the present issue is that ppl prefer speaking in english rather than speaking in hindi or their mother tongue. According to UNESCO there're about 196 Indian languages that 're enlisted as endangered. There is an urgent need to conserve these languages and ensure their propagation to the next generation... or so I believe.
I am aware that globalisation would soon cause a number of languages to become redundant. India takes pride in the fact that it is the 2nd largest english speaking country, this is proof enough that majority of us still 've a colonial mindset.