Dude programming languages have nothing to do with mother tongue. English is used in all known programming languages be it C,C++, Python,Java. The reason being most of the development in this field was done by Americans,British,German and Canadian experts of CS.
Also one does not need to learn Queen's English to be a top coder. The reason why the Chinkies are doing well is because they have invested in the educational institutions of their country and have given their students support in pursuing CS degrees abroad. China doing well has nothing to do with them coding in Mandarin,if such a thing even exists. Look up the number of Chinese students in US universities. Otoh in India only IIT,BITS,NIT,JU and a few select institutions have alumni who go abroad. Chinese parents use most of their wealth on their single kids to give them an education abroad. Also as China is a more wealthier nation with better QoL than India and some of these well trained Chinese return back to their native soil to be a part of the workforce there. Indian research is also very poor. Very few IITians end up doing their PhDs in India instead they opt for a plump IT coolie job abroad or a professors post in an US University after doing their grads there.As a consequence our research work is done by people who have neither the motivation nor the mental acumen(barring a few) to bring out some top notch innovation in their fields. Also majority of the Indian researchers and even professors(barring the ones from Elite institutions) end up plagiarising their work from well known foreign researchers. You will be astonished to find out how many plagiarised papers have been sent to foreign journals for publishing.(Read up Quora) Imagine the gall of these people who do such fraudulent acts. Also I would not even go to the topic of predatory journals in which has mushroomed in India recently.(China also has the same problem of predatory journals btw) The thing is for original research you require time,effort and money. Indians cannot be great researchers when they are being nagged to settle down,get married and earn a decent living. People require financial aid to be good thinkers and researchers. Most of the doyens of mathematics like George Cantor,Godel,Boltzmann went mad or senile. They were supported by their states and some of them were so engrossed in their work that they forgot to eat,bathe or even maintain their mental faculties.
Coming to coding in Indian langauges it can be done as Coding is nothing but writing a mathematical and logical sequence to get a desirable and valid output. Coding is a form of applied mathematics. However such an indigenous effort will hardly make a dent in the world of computing. The thing is most coders from reputed institutions already understand and converse in English. A vernacular language will hardly help in improving the quality of coders who come from affluent backgrounds and understand English very well.
Instead GoI should divest effort in the form of scholarships and research posts for CS graduates. The fact of the matter is to do well in any field you have to invest money and resources. Wealth is what nurtures intelligence and talent.