Ok, so I got the notification inviting me to try pirate english. I clicked the link in the popup from the notifaction area, which apparently launches the updater program, which in turn requests admin privileges with a UAC popup. At this stage I'm even more curious/suspicious so I took some time to google for some more info. A couple of minutes pass and the UAC prompt times out. Now I see an error "Failed to load language dll" and the Avast icon in the notification area is not responding. I reboot and am greeted on login with the same error, and Windows notifies me that I have no active AV protection.
So cute idea guys, but (1) you got me a bit worried with this pirate stuff - I didn't expect such a fine sense of humor from my security software and (2) I'm now trying to repair my Avast installation because I timed out making a decision on it.
By the way, I would file this as a bug report but I'm not sure where. Maybe someone can point me in the right direction.