Ki cholche?

It seems that a portion of Bengalis who are living outside the Bengal tend to forget their mother tongue even at the most simplest of phrases.

It was on the other day my-friend-Sirshendu's friend Rahine, who is living in Mumbai for almost the last two years, greeted me in Google talk saying "Ki cholche?". Not only this. My school friend Abhishek Das, living outside Bengal for some time now, did the same. Even he told me "Hi, ki cholche?".

I was really surprised by this wrong way of constructing phrases by Bengalis themselves. So how can we expect other people who live in Bengal, apart from Bengalis, to speak correct Bangla.
I immediately found out the root of the problem. In Hindi people generally greet each other by saying "Kya chal rha hai, bhai?" and "Ki cholche, bhai?" is a direct translation of the Hindi phrase. I was amazed that nowadays, even Bengalis are thinking in Hindi. I don't know in which direction Bangla is heading towards? I have nothing against these two guys, but I strongly condemn their ignorance regarding their mother tongue.

When I explained this aspect to both of them, Rahine took it sportingly and gave a reason that he is a half Bengali and Abhishek tried to shut me up my mouth by saying I was speaking too much "bakwaas" that day, just like an old school friend. (in modern Bangla, "Bhaat bokchish")