What is the author's style in The Prague Orgy by Philip Roth?

The language of the novel is very informal. There is a lot of swearing, especially "fuck", which is used constantly throughout the novel by Olga. Roth constructs the sentences to show literary, but concise writing. The dialogue is straightforward and informal. It is only when Zuckerman has his reverie about Judaism on the trolley does the language become more literary and formal. Throughout the novel, the language is not without rules as the author writes in a grammatically perfect way. The sentences follow grammar rules and complex rules of literature. It is a literary novella. The characters do not speak in Czech, although there are a few lines of German when Novak and Zuckerman speak.