Korean code support in LibreOffice is only supported by ko-KR.
Korean language is officially used in Both Korea[North and South] and the Yanbian Korean Autonomous Prefecture[연변조선족자치주, 延边朝鲜族自治州/延邊朝鮮族自治州] and Changbai Korean Autonomous County[장백 조선족 자치현, 长白朝鲜族自治县/長白朝鮮族自治縣] of Jilin province, China.
Below is Korean Language's Standard Regulators
1. South Korea[대한민국, Republic of Korea]
국립국어원(國立國語院, National Institute of the Korean Language)
2. North Korea[조선민주주의인민공화국, Democratic People's Republic of Korea]
사회과학원 어학연구소(社會科學院 語學研究所, The Language Research Institute, Academy of Social Science)
3. Mainland China[People's Republic of China]
중국조선어규범위원회 中国朝鲜语规范委员会(China Korean Language Regulatory Commission)
Below is Korean's Language code list.
1. South Korea[대한민국, Republic of Korea]: ko-KR
2. North Korea[조선민주주의인민공화국, Democratic People's Republic of Korea]: ko-KP
3. Mainland China[People's Republic of China]: ko-CN
"ko-KR": "Korean - Republic of Korea"
"ko-KP": "Korean - Democratic People's Republic of Korea"
"ko-CN": "Korean - China"
Adobe CJK Type Blog
"GB 12052-89: PRC Standard For Korean" https://blogs.adobe.com/CCJKType/2014/12/gb12052.html
I think LibreOffice should support Korean Language codes, not only "ko-KR"(South Korea) but also both "ko-KP"(North Korea) & "ko-CN(Mainland China).
only supported Korean Language code "ko-KR"(South Korea)
can support some Korean Language Codes, not only "ko-KR"(South Korea) but also both "ko-KP"(North Korea) & "ko-CN(Mainland China).
User Profile Reset: No
Example of "ko-KP" code.
North Korea's Linux distribution ,"RedStar OS(붉은 별 운영체제)"'s Office suite is based on OpenOffice.
I think, It had add Korean Language Code, "ko-KP"
Microsoft products already reserved Korean language code, "ko-KP".
1. Language tag: "ko"
Language ID: "0x0012"
2. Language tag: "ko-KR"
Location (or type): Korea
Language ID: "0x0412"
3. Language tag: "ko-KP"
Location (or type): North Korea
Language ID: "0x1000"