Bangalore is the only place in India where they speak 7 languages Kannada, Tulu,Konkani,Hindi, Urdu, Tamil, Telgu and Malyalam.
Now a days in Bangalore be it is BMTC Bus,Road side, construction side, road side food vendors i can see lot of UP and Bihari walas. If you go to Marathalli and Whitefield you feel as if your in Gurgaon or Noida. It is not only Tamils North indians Population rising like anything.