Multilingual
One of the cool things about internationalizing a piece of software (making it so that its interface can be easily translated into other languages) is that it lets you localize the software in some unusual languages.
Case in point: if you go to Google's language tools page, you can specify (down at the bottom of the page) what language you want the Google interface to appear in.
There are plenty of languages that are commonly used by real people listed there, such as Arabic and Hebrew and Swedish and Russian. And there are some less-common ones, such as Afrikaans, Albanian, Basque, Frisian, Tamil, and Scots Gaelic. And a couple of invented languages: Esperanto and Interlingua. And then there are, well, the others.
Yes, you can use Google in Swedish-Chef-speak, Elmer-Fudd-speak, Pig Latin, or Hacker-spelling.
Ain't modern technology wonderful?