Hi Andy,
I went through this trying to switch English & Japanese. You can do the same with Korean & its quite painless using Fcitx.
Check out the last few posts in the thread linked below.
There are 5 or 6 packages to enable support which you can install easily using Add/Remove software & searching “Fcitx”
You will need Fcitx-hangul instead of Mozc(japanese)
In my OS Settings > Keyboard > input sources, I just have the correct layout for your keyboard,Japanese in my case.
がんばってください！
- manjaro-asian-input-support-fcitx5
- fcitx5
- fcitx5-gtk
- fcitx5-qt
- fcitx5-hangul
- fcitx5-configtool
You will find the config tool in your system tools "“Fcti configuration tool” you can enable a topbar icon to quickly change, or use a custom-key.
In the config tool you just need to add Hangul as a 2nd option. As you can see on mine on the left for Japanese.
