Try using these "laws" and "rights" when you're trying to apply for a university, or asking a IIT to teach you in Hindi/Tamil LOL. These provisions are mostly used to skirt around the (generally onerous) laws by so-called "minority institutions" (eg. Manipal).
It's very disingenous to make such arguments by anyone with their eyes open in India. It's almost like the classic quip (almost a criticism of proto-liberalism) about the British empire: everyone is free in it as long as he's British!
Indians will go to Germany and learn German; go to Japan and learn Japanese; but will resist building anything of value with the culture/language of their own states of residence. The Anglophone-Indians will religiously preach a particularly seductive form of nationalist-liberalism internally for India that continues all the colonial structures of the British empire, because it helps them optimize for their own economic outcomes (ofc. they do this internationally too).
Absurd state of affairs tbh - and it has (eg. Blume Ventures' report) and will keep India poor with the wealth limited to ~5-10% of the population.