The BBC have a
very clued-in article about "Hinglish" the
mishmash of English with
Desi words and constructions. The title is "It's Hinglish, innit?" which may not be very funny, unless you know that British Indians tend to use the British tag phrase "innit?" at the end of sentences that British English would have ended with other tag phrases such as "does it?" or "isn't she?" "Innit?" comes from "isn't it?" which is the phrase that more educated British Indians use (but just as indiscriminately) instead.
Many things can be said about Hinglish. One usage that I've heard a lot but that wasn't mentioned in the article is "long back", which means "a long time ago".
The comment section is worth reading, if only to be delighted at how few people there are who are uptight about British English being "polluted" by outside influences.