How to change font to a different language on the computer?

when you are writing something on the computer, how do you change the text to a differnt language???How to change font to a different language on the computer?
First, You need install the language you want to use.For example, if you are now using an US English Operating System and you want to write in Eastern Language like Japanese. You first need put your install disk into CD and install it.

Then You go to ';Control Panel';,choose ';Regional and Language Options';.Choose ';Language'; button and click ';Detail'; button. Select the ';Japanese';. Then click ';Ctrl';+';Space';. You will be written in Japanese.

View More please go to http://www.downpanda.com/japanese-downlo or search in it.

Wish you good Luck. You can contact me anytime you want.