This request is for the language code ko-kore in lexemes and monolingual text, which will be used for text which combines both Han characters and Hangul. (See: mixed script item https://www.wikidata.org/wiki/Q711797) Examples of lexemes:
https://www.wikidata.org/wiki/Lexeme:L1320239
Change #1052687 had a related patch set uploaded (by Raimond Spekking; author: Raimond Spekking):
[mediawiki/extensions/cldr@master] Add Korean mixed script (ko-kore), not part of CLDR, used by Wikidata
Change #1052687 merged by jenkins-bot:
[mediawiki/extensions/cldr@master] Add Korean mixed script (ko-kore), not part of CLDR, used by Wikidata
Works on "my" test item https://wikidata.beta.wmflabs.org/wiki/Q526807 , see near the end of the monolingual section. Please test it for Lexemes too. Thanks.