Besides, whether you agree or not, my personal observation is that more you learn english, more pollution you get in native language.
I won't term it as pollution. Rather I would say that, the main reason for english to become international is because it have the ability to adapt and isn't rigid on the things that can or cannot be added in its vocabulary.
English is able to change its accent, merge, add or delete various words according to the speaking habits of the native people to such an extent that it's words are often used more as they are easier to remember/recall rather than the native language of people.
That doesn't mean that other languages are bad. But, the main reason for any language to become popular/international is to have the ability to adapt with time, regionals and customs. For eg: Hindi is now often reffered to as Hinglish when it comes to technology. I don't see that as a bad thing because it increases the acceptability and competitiveness of preferred language.
From pure academic point of view, it's not a good thing. But, from a broader perspective, we live in a global village connected through internet. Everything is coming together and common standards are being developed.
Things that don't change with time perish in the dust of time and get forgotten. Similarity, the languages that won't be able to adapt and change would get forgotten and ultimately perish. And between all those chaos Hinglish won't be the one to perish.