Hi!

Since there is no entry for gnome-keyboard-properties in bugzilla, I filed that feature request here. I found no better place, feel free to move it to a better place.

As far as I know, it is not possible to enter complex scripts like Korean Hangeul or Chinese/Kanji with Gnome. You have to use SCIM (www.scim-im.org) for that, which is not part of the Gnome distribution. I'm a German user, but since I learn Korean, I have to switch between German (I use a Dvorak layout not supported by SCIM) and Korean quite often. But it is not very well integrated into Gnome. I have to do this:
Setup: Enable SCIM for this application (Right click -> Input Methods -> SCIM input method)
Switch script: 
1.) Select the keyboard layout via the panel (1 click)
2.) Select the SCIM translation (2 clicks to disable the translation, 3 clicks to enable it)

It would be far easier, if I could bind a SCIM translation to a keyboard layout in the gnome-keyboard-properties (for example bind "Korean 2bul" to the Korean keyboard layout), which is automatically activated once the keyboard layout is selected. Also it shouldn't be necessary to enable SCIM for every application, where I want to use it. Like in Windows, it should just work. Since SCIM is released under the GPL and LGPL, it should be easy to integrate it into Gnome.

Gnome was always at the head of the Linux i17n movement. Thats why I would expect a good support for complex scripts from it. 

Regards, 
Johannes