To add a language "XX":

 1. Add mywidget_XX.ts to the TRANSLATIONS entry of i18n.pro.
 2. Run 'lupdate i18n.pro'.
 3. Run 'linguist mywidget_XX.ts' and translate the strings.
 4. Run 'lrelease i18n.pro'.
 5. Run './i18n XX'.

Contributions are welcome. Send them to qt-bugs@trolltech.com.