When you first install openSUSE Tumbleweed and try to view Korean characters, you’ll find that they’re very ugly. That’s because they’re characters from the GNU Unifont typeface which doesn’t have any focus on looking nice.

To get good looking Korean types, I did the following:

• Install texlive-unfonts-core-fonts. This package has the OSS versions of core Korean fonts like UnBatang (Batang/Serif) and UnDotum (Dotum/Sans-Serif).
• At this point you’ll get better looking types on KDE and Kate, but might notice Firefox looking funny.
• In Firefox Preferences:
  • Go to Fonts & Colors, then
  • Advanced, then
  • Fonts for Korean, then
  • Select UnBatang for Serif and UnDotum for Sans-Serif (https://en.wikipedia.org/wiki/List_of_CJK_fonts)

Now you should have nice looking Korean types everywhere on openSUSE Tumbleweed.