Hey theatrequalslove , I know exactly what you mean as I have exactly the same thing happen to me but I get a good laugh out of it and everyone else does as well.

Because I've naturally got a good sense of humour, my brain is like a sponge to comedy which helps me see the funnier side of life such as turning negatives into positives. Also with the Echolalia, I go into a scottish accent and that is because a scottish girl had a big impact on my life therefore the accent shows itself when I'm very stressed or upset.
Kool though, Thought I was only one and going completely mad haha.
Cheer's lol