Welsh has several words for 'yes', but doesn' 23 3, 11:25am

@Edhellas
Nothing too odd about that, really. There's plenty of expressions in English that literally use negative phrasing, but figuratively have positive meaning. In most cases, the more roundabout way is considered the more polite phrasing.

"Why not?"
"Won't you have some...."
"I wouldn't mind."
"Perish the thought!"