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South Korea
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1 (National)
Korean
[kor]
1 (National). De facto national language. 50,200,000 in South Korea (2020). Total users in all countries: 81,721,960.
4 (Educational)
English
[eng]
4 (Educational). 5,141,000 in South Korea, all users. L1 users: 141,000 in South Korea (2020). L2 users: 5,000,000 (2014 The Diplomat).
Korean Sign Language
[kvk]
4 (Educational). Recognized language (2016, Korean Sign Language Act), Requires a KSL Development Plan every five years, promotion of standardization, use of KSL in education, promotion in other areas of life, competency testing, and interpreters. 180,000 in South Korea (2008 WFD). Approximately 0.4% of total population. Total users in all countries: 308,000.
8a (Moribund)
Jejueo
[jje]
8a (Moribund). 5,000 in South Korea (2014 W. O’Grady).
Unestablished
Chinese, Mandarin
[cmn]
Unestablished. 198,000 in South Korea (2020 census).
Mongolian, Halh
[khk]
Unestablished. 32,700 in South Korea (2020).
Nepali
[npi]
Unestablished. 27,200 in South Korea (International Organization for Migration (IOM) 2019), based on nationality.
Tagalog
[tgl]
Unestablished. 30,000 in South Korea (2020).