Script Summary: Add your facebook events to currently logged in Google Calendar. Multi-language support available (currently EN (GB and US) and FI). Post in the discussion thread if you want a language added.
This is based on P. Organisciak's (discontinued) script at http://userscripts.org/scripts/show/8294
Note that you may need to refresh the event page to get this script to kick in because of the way Facebook now requests pages using AJAX.
If you want your selected Facebook language supported, read the source to see how the languages work and send me a block of code with yours in.
Update v1.3.1 07/03/2009: Added EN(US) support (thanks sopuli) and included a link back to the event page in the calendar description
Update v1.2.0 16/12/2008: Added Finnish language support
Update v1.1.0 15/12/2008: Auto-update restored, added ability to have different languages
Update v1.0.1 12/12/2008: Working for events which last only one day.