Japanese does have specific ways of speaking that are thought to be stronger than others, and there are many ways to insult people. Beyond uttering potentially insulting words like bakayaro, you can offend someone by using the wrong grammatical form of a verb or noun—similar to how an English speaker might offend his surgeon by addressing her as Carla instead of Dr. Lee. Japanese even has a special way you’re supposed to talk to the emperor, with its own prescribed noun and verb forms, without which you could surely offend.
