This page uses the Arial Unicode MS font to display characters in multiple languages, without specifying any character encoding. Also included is a picture of what SHOULD be shown if your browser is Unicode-compatible and the font is installed.
This is English.
это русский язык.
This is a picture of what you SHOULD be seeing above:
Unicode should eventually enable us to stop worrying once and for all about language support, character encodings and fonts (except for aesthetic purposes). For more info, go to http://www.unicode.org.