The Republic of India does not have a national language.[4][5] The official languages of the Union Government of Republic of India are Hindi in the Devanagari script and English,[6][7] a position supported by a High Court ruling.[4]

Wikipedia is great! Now I have to look up what the difference is between the Republic of India and the Union Government of Republic of India. :O

There are also over 1,500 native languages. Wow! 

Officialy there is no national langauge of India Hindi and the English are 2 main offical langauge of country .Hindi and English are also the link langauge of India .Around 60-70 percent peoples can Understand Hindi in India and 10% English .English is the link language among well educated peoples and Hindi work as link langauge between comman peoples . So unofically we can say Hindi is the national langauge of India because its the most spoken language and helps common peoples having diffrent langauge to communicate each other .Except some south Indian states where English dominate and Hindi is less known.

India doesn't have any national language but there r 2 official languages Hindi n English n some 22 regional languages as per 8th schedule of the constitution of India

I honestly don't know how to answer this question. but let me try it. India has many language as far as I know. but the Official language is hindi.

Hindi Language is National language and also Sanskrit language is national language.! But In India speak more type of language. Every state speak difffernt language.! Especially Speak In India.! Hindi, English Sanskrit Language.!