Is it normal to fart in public in South Korea?
Depends.It depends
Accidental farts happen everywhere, including in South Korea, but deliberately farting loudly in public would generally be considered embarrassing or rude. If it happens, most people will understand a quiet apology or simply moving on.
Bodies don’t follow etiquette rules, so an accidental fart can happen to anyone. In South Korea, as in many places, intentionally making a loud public display of it is generally likely to be seen as impolite or embarrassing.
If it slips out, you don’t need to make a big scene: a brief “excuse me” is plenty, and carrying on is usually less awkward than drawing attention to it.