My friend your comments i am feeling little harsh.
In India there are many languages are use officially other than Hindi and you should know this. Language is only a means of communication and it should not become a Hurdle for knowledge sharing.
Now can i ask you if any other Indian comes and ask you Do you know Tamil, Telugu, Malayalam, Kannada, Marathi, Konkani, Thulu, Gujarati, Oriya, Manipuri, .....etc. do you feel shame and down your Head?
So please don't make language an issue here.
And for your information i know Hindi very well, and posted a lot of posts in Hindi here.