Let's get this straight. There's "American English" used in the US and Canada. And then there English, where "colour" is spelled with a "U", and that's used in lot more countries, and natively spoken by more people than American English.
Really? Are you talking about India? If so, I'm not sure what percentage of people have english as their mother tongue - I think it would be quite small. Also, I think indian english is about as dissimilar to british english as american english is.
'Colour' and "Cheque' are spellings that are common in Canada.