I agree Bangalore is not a tourist place. But you have so many things to see, which you get in other city.
I am providing you some, when you visit next time -
- Bannergatta National Park
- Vishveswaia Technical musium (One of its kind in India).
- Temple - Iskon & Shiva Temple on old airport
Hope you enjoy your next visit.
Regarding language, I am from North India (Bokaro), and in Bangalore from last 10 years. I never-never had any issue with my hindi. Even now i know very little Kannada, never felt language problem. Yes some auto guys type of person you can find everywhere and they just act like they don't understand.
These are my personal view/experience.