Kurt Vonnegut on how to write with style when English is not your first language:
All these varieties of speech are beautiful, just as the varieties of butterflies are beautiful. No matter what your first language, you should treasure it all your life. If it happens to not be standard English, and if it shows itself when your write standard English, the result is usually delightful, like a very pretty girl with one eye that is green and one that is blue.
– originaly printed in Palm Sunday in 1999