The Stone Studio™ - as of May 1 2002 - runs in these languages:

English
German
French
Spanish
Italian
Swedish
Japanese
Dutch
Danish

To choose another language, move it to the top of the list in System Preferences -> International pane, then relaunch the application!

If you'd like to localize the Stone Studio into your native tongue in exchange for free licenses and a nice dinner, please contact us at info@stone.com!