- Create an account on Commons
- Use it for a while on Commons
- For the first time go to the French Wikipedia
- See the blue notification, click on it
- Get this page saying that there is no notification:
@Nicolas_Raoul When you first log in to French wikipedia, and go to Special:Notifications page there - you won't have any notifications under 'Unread' tab. The left panel on Special:Notifications page shows only unread notifications. If you do not have unread notifications in other wikis - other wikis won't be displayed there at all.