Display South Indian Languages in Unity Editor and Game

I'm developing a regional app for South India. When I copy the text to editor it all messes up the letters. The words are split and shown. I have the proper fonts installed for all languages(Telugu, Kannada, Tamil).

When I enter this "ధర్మరాయ " it shows this "ధర ్ మ ర ాయ "(Something like this)

Please help as I cannot go ahead without displaying this,. My core theme of game depends on displaying text.