means No (I discovered today) in current American.
But "I'm bad" or "I'm not good" seem not to mean Yes.
In French Oui means Heard.. and in Irish
there's no special word (adverb, particle, suffix, prefix or interjection) at all.
The word often pronounced (and in place-names transliterated)
big (beag) in Irish...means small.
|Irish pub: The Wee (small) House,|
Being a half-pint pansy
I have rarely "been good" for a pint in a pub - or a hole in the wall.