Prior to my diagnosis and a few times since, I had episodes of "word salad". I would speak and the English language was not what came out of my mouth! I was conscious of it but literally could not produce the words I wanted to say! One time it was to my doctor's office, hope they did not think I had completely lost my mind, another was to a good friend whose father also had PD.
I knew in my mind that it was just jibberish coming from my mouth, but could not form any words!