Never heard of gotton until this thread. Gotten, yes. UK throws "u" in all kinds of places we don't, as in colour, Saviour, behaviour, etc. Shrug. Is why I say we don't speak English, we speak American. I think after 200 years we ought to admit we speak our own language!
(Giggles) all these years I've differentiated my speech with the disclaimer, (note finger quotes)"the Queen's English." After all, I will usually slip into a posh accent during said point of reference.