Korean characters in Qt5 applications not rendering

Hello everyone!

I have a smallish issue with Qt5 applications on my Gnome desktop (although I think the problem was present when I tried Plasma as well). Korean characters don't render properly, instead they simply appear as square boxes. This appears to be the case regardless of the font I configure Qt to use.

I'm assuming this may be a locale issue, but not sure how to work around it. The problem is not present in GTK applications.

$ locale -a
C
en_GB.utf8
en_US.utf8
POSIX
sv_SE.utf8

I am a bit ashamed to admit that I didn't find this solution on my own sooner (although most hits for Qt5 and asian fonts just landed me on coding advice).

The solution was simple enough, I installed noto-fonts-cjk

sudo pacman -S noto-fonts-cjk

I also rebuilt the font cache, although I'm not sure that was strictly necessary.

fc-cache -f
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