Wernicke's area
"When you ask a person with this problem a question, they will respond with a sentence that is more or less grammatical, but which contains words that have little to do with the question or, for that matter, with each other. Strange, meaningless, but grammatical sentences come forth, a phenomenon called "word salad".Like Broca's area is not just about speech production, Wernicke's is not just about speech comprehension. People with Wernicke's aphasia also have difficulty naming things, often responding with words that sound similar, or the names of related things, as if they are having a very hard time with their mental dictionaries".