So in my fantasy story, to shake things up, and to avoid the dialouge being stilted and boring I decided to have the characters talk in a more contemporary fashion. Sort of like they did it in the movie: "A Knight's Tale." The characters for the most part speak appropriately for the Middle Age setting, but every now then throw in some contemporary words and phrases here and there (One of the characters, Watt says, "Heellloooo..." and the MC's love interest says a sarcastic "wow..." at the MC's lame attempt at poetry, etc..) But then I got several critiques saying that I should avoid doing that, even if for the most part they speak as they "should." I've even gotten a critique that said, in lieu of the familiar swear words, I should make up my own. To me that would just make the dialouge seem awkward and hard to get into since the reader really has no idea why I just randomly threw in a made-up word. So I guess my question is, is having such contemporary words in a fantasy story that big of a deal? Even if it is minimal for the most part?