Bad pronounciation and wrong grammar are the engines by which new languages are created. If people didn’t mispronounce Latin, we wouldn’t have such beautiful languages like German, French and Italian.
The same goes for Hindu/Urdu, Sanskrit, Kannada, modern Persian and Arabic. All are “distorted” versions of one ancient language or the other.
So, the next time someone corrects you on your grammar or pronunciation, tell him you’re actually contributing to a future language 🙂