Why Telugu people have less love on their Mother Tongue "Telugu" ?

I am presently living in Bangalore.Recently I went to Hyderabad. I am a Telugu man.In hyderabad I have observed that there are very less sign boards are written in telugu. Even on the busses also less preference is given to telugu in AP. Where as in Karnataka and Tamilnadu much preference is given to their mother tongues. If it continues to happen in future also this may be dangerous to telugu. No need to hate or blame other languages.But Mother Tongue must be given much preference. If any telugu people notices my issue please reply me.