azulon

1. A protest isn't just a speech - it's an act. It's an act of blocking a street, occupying a square, crowding or obstructing a neighborhood etc.
2. In democratic countries, a permit isn't an ask for permission, but more like a notification. Like you say youself: all permits are approved. But you are warning the city that a protest is going to happen here and there.

I imagine that a failure of connection between brain and hands is possible though. We wouldn't call it "stutter" normally (it would probably surface as some kind of tremors), but effectively it would be a sign language alternative to stuttering.

I think Gogol (a classical Russian writer) called a 35 year old lady "an elderly woman". Never paid that close attention, but I imagine such occurrences can be found throughout classical literature.

It has to do with environmental factors, I think. Like maybe their station affects acoustics somehow. Overall, a dialectal linguistic change generally requires a shift of generations.