Does strong language have an impact on the commercial success of a book? There is a big difference between dialogue and transcribed speech. When people talk, in the right environment, every other word can be expletive and no one cares. Usually, this is because the swearing in speech is often used as a wild-card adjective to save having to think of anything more suitable. With teens, there is the added w hammy that bad language can define independence. It becomes such a prominent part of their language that some kids can speak in nothing other than swear words and still get their point across. In a book, that would be awkward to read and ultimately dull. Some writers of adult fiction suffer from this; their novels are so peppered with profanity that you end up having to skim through repetitive crap to get to the story. That bugs the hell out of me and usually puts me off. So when is it appropriate? A carefully placed f-bomb can have real impact in certain situations. Rather t...