ko vs ko_KR

sebul <[email protected]> Sat, 18 Oct 2025 11:33:06 +0900
Newsgroups gmane.linux.debian.internationalization.general
Message-ID <CANy4eeWARaJk7UsKG9Enqo4dTyiT7VwmQe+4UtME415q=5dWrg@mail.gmail.com>
Hello.

https://www.debian.org/international/l10n/po4a/rank.en.html
say
ko_KR 2449 (7%) – Korean, as spoken in South Korea
ko 2082 (6%) – Korean

What is the difference between ko and ko_KR?