Jargon aphasia
Jargon aphasia is a type of aphasia where the affected individual generates speech that is incomprehensible to the listeners. It is an instance of Wernicke's aphasia. People with jargon aphasia may replace a desired word with another that sounds or looks similar, is semantically related, or, in some cases, with random sounds. People with jargon aphasia often use neologisms, and may perseverate if they try to replace the words they cannot find with sounds.