Add locale forum to ko_KR

I’m localeLocale Locale = language version, often a combination of a language code and a region code, for instance es_MX denotes Spanish as it’s used in Mexico. A list of all locales supported by WordPress in https://make.wordpress.org/polyglots/teams/ manager of ko_KR locale.
I want to add locale forum for ko_KR, and helphub.
Translation of forum is 100%.
REF: https://meta.trac.wordpress.org/ticket/4615#comment:8

#request