I nearly got into trouble once. In a bank. I signed a document, the signature didn't quite match, they kept asking me to redo it ("we need it just like in the passport") but after the third or fourth try they let it through.
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.
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