Adoker wrote: If you wanna use English, at least double check what you are writing. It's called fresh off the boat. What in god's name is fresh of the boat?
I am supposed that "double check" should be noun but "double-check" be verb. You have to say "If you wanna write in English, at least double-check what you are writing.", or "If you want to write in English, at least have double check for what you are writing."