The Korean version of Wasteland 2 is published by H2 Interactive and is exclusive to South Korea. It is only available through H2 Interactive's own web site, and H2 Interactive supports that version of the game separately.
Korean language options are not available in Wasteland 2 outside of H2 Interactive's own special Korean release of the game, and it is also not included in the main Wasteland 2 game that is available worldwide.