Well...I run KDE so this will probably be different in Gnome or other window managers.
KMenu --> System Settings
Select "Regional and Language"
Click "Install new Langauge" and find Thai, then click install
This will allow you to convert your system to recognise Thai as the system language.
Now select "Keyboard Layout"
Find "Thai" and add it to the Active layouts section.
Press OK to everything and close all windows.
Now you will have a button on your taskbar where you can select US or THAILAND. If you select the Thai flag you will be able to type in Thai.
If you want to do this via the command line, I have no idea. I imagine that this process will be very similar for Gnome.
-Good luck: jack
Last edited by jax8; 08-01-2008 at 11:45 AM.
Reason: spelling error