Maharashtra will definitely not be without Marathi and West Bengal will not be without Bengali. I also suspect that most other languages will also survive.
The same is also true about Hindi.
You must be a foreigner since you are willing to accept a European, language as the national language over an Indian one. Pathetic mate. Next you will be calling all our freedom fighters as "traitors" since they forced the British to grant us Independence.
Shame on you.
This is the my only response to you. I will not be wasting any more time on your posts.