One of the great features of the Mac is its support for multiple languages. This is a feature that is built into Mac OS X and many applications support multiple languages. I came across a program that allows you to easily switch between the language for a program on an individual basis, without changing it for the rest. It includes the option whether to change it just once or to keep it set to that language. The program is called Language Switcher. There are some programs that it may not work with, such as Firefox, as it isn’t native to the Mac. However, with Firefox you can download a language pack and use an add-on such as Locale Switcher.