`setxkbmap kr` not doing anything?

I'm trying to add a configuration to my multilingual setup on my ArchLinux desktop, but Korean doesn't seem to do anything, despite it being listed under setxkbmap. How do I set it up similarly to other languages? So far, what I've been doing is basically this:

# For US International:
setxkbmap -layout us -variant intl

# Or for just US:
setxkbmap us

Why doesn't this work:

setxkbmap kr

Am I missing a (Pacman/AUR) package?