A case study on Human behaviour

Its amazing how people can influence one's thinking. I decided to write some mad philosophy or so called crap theory after a conversation with an engineering batch mate of mine. She is working with an MNC in Chennai.
The whole point of conversation was "People from Tamilnadu speaks the perfect English (Specifically British English)" or in simple words they speak like the British.
(Disclaimer: This is not written to hurt anyone nor to prove anything, its all about opinions)

How to pronounce few words
1. Hall n Mall are to be pronounced as Haall n Maall
2. Auto (her view 'aato')-- referring to the auto rickshaws...
my question do you pronounce automatic "aatomatic"
and so on...

and to add to this mallus don't know how to pronounce words.. That was enough to wake up the killer spirit in me...Rest of the conversation is history

But coming back to the human behaviour stuff..
what if this colour so called blue by me is what you see as the so called green by me. And your are taught to believe it is blue, and you call it blue even though thats the green i see.
There can't be a proof to substantiate this nor to disprove it, how can you prove the colours we see in the same thing are the same. Its a manipulation done by brain. It interprets the colour not your eyes. Its taught to believe its blue!!!The colours white and black has to be perceived as the same by all, as black is the combination of colours and white the same with visible rays.
When you tend to believe what mass believes, you become a part and makes others believe the same, n thus human beings civilized.

Similarly what if she is made to believe so. what if they are made to believe so. There is no point in arguing with life...