Google Calendar Sync for Google Calendar to/from Microsoft Outlook has launched!

Google Calendar Sync for Google Calendar to/from Microsoft Outlook has launched! - Updates and Maintenance Announcements | Google Groups:

"Hi again,

I've seen a few questions arise and wanted to clarify...Google Calendar
Sync is currently in English only. The team is working to make this
tool available to more languages soon.

If you're using Google Calendar Sync, make sure your Help Center
language is set to 'English (US)' in order to view the relevant Help
Center articles.

- Becky"