Re: Two Ways
India is talking about self sufficiency not stupidity, no one country has the resources to be totally inward looking. Even the US had to buy titanium from the Soviet Union during the cold war to build it's SR71s.
The Legal languages of India are Hindi and English, most official documents and reports from parliament are printed in those two languages as are the majority of research papers, the High Court uses legal English.
The three top languages in India are only spoken by about a third of the population, the rest speak their own regional/ethnic languages and often one or more others so the government is unlikely to alienate a significant portion of it's population.