This is actually a really awesome article, though poorly titled for the HN crowd. It is about brain research in brain injured individuals and how that impacts use of language:<p><i>Studies from people with different types of aphasia have delineated different brain regions that regulate different aspects of communication. Wernicke’s area is like a dictionary: it helps us to understand the meanings of the words we hear and to choose the words we want to use in a particular context. People with damage to this area can’t understand language, yet they can pronounce words and assemble sentences—it’s just that the sentences they come up with don’t make any sense. Broca’s area is in charge of producing sounds; people with damage to this area have trouble articulating words and sentences.<p>But both Wernicke’s aphasics and Broca’s aphasics, and even global aphasics, can swear. These swear words are coming from somewhere else in the brain, not the parts known to be responsible for generating the rest of language.</i>