Installing Language is support is very very easy when compared to windows XP. In windows XP to install additional language and complex scrips you have first install the language pack. But this is not the case with windows vista in which it is just out of the box.
1. Go To control panel --> Regional and Language Settings --> Go to Keyboards and Languages Tab
Click on Change Keyboards...
Click on Add (in installed services)
Now you will see list of Languages available. This is far more than windows XP and just out of the box.
Now you can select any languages you want and the keyboard layout given in the list. You can also preview the keyboard layout to make sure of the layout or to know the keyboard layout.
Thus the lanugage support in Windows Vista is far easy and better than windows XP. It takes some time for the people to adopt to Windows Vista but it has lot many features, which i will cover one by one in future.
Thanks for Reading.