Linux xkb list

List can be found heere
/usr/share/X11/xkb/rules/xorg.lst

Set by command
setxkbmap -option 'caps:hyper'

Now run ibus-setup, navigate to add type `Hyper_L` prevent switch case and toggle layout.
FYI: key name you can found with `xev` application

For persistent changes
/etc/X11/xorg.conf.d/00-keyboard.conf


  1 Section "InputClass"
  2         Identifier "system-keyboard"
  3         MatchIsKeyboard "on"
  4         Option "XkbOptions" "caps:hyper"
  5 EndSection