All your taginfo links prove is that "pound" is a word much more often used than "pinfold". You would have to check what the "pound" in all the placenames refers to. "town pound" is also used in the United States, I have come across no instance of "town pinfold" yet, so it is a word used not just in the South of England. I'm not trying to get rid of regional words, but we need a standard that is understood intuitively by people.