Transnational Korean Englishes presents the many faces of English in South Korea (henceforth also Korea) – from Korean English forms and functions to English loanwords in Korean, and from the influences of Korean on the English language to Korean cultural exports. Drawing on specialized and purpose-built spoken and written corpora and other empirical data as well as previous studies, the Element illuminates the Korean-English language contact setting from a range of perspectives, shining light on various transnational Korean English phenomena. Guided by questions of legitimization and codification, this Element shows Koreans as productive and creative users of localized English forms, with hallyu (the Korean Wave) promoting not only Korean pop cultural products around the world but also contributing to influences of Korean on English worldwide.