Ubuntu has a switch for different language, easy...

Once you need Firefox in Thai, things are a bit more complicated, you cannot just add-remove from Linux, you have to see with Firefox to adjust!

Firefox speaks your langauge, well, over 40 they provide but the installation is not easy and automatic. Once downloaded, you end with a lot of folders on the screen, and google can not yet type in Thai...

have you installed firefox in more then one language successfully ?

As i have to go to some Thai government sites, i am stuck, advice appreciated...