Translation updates on home wiki
Now I'm thinking, could the reason for this be that these messages are not marked as "reviewed"?
1) Currently translation updates go with the MediaWiki train: https://wikitech.wikimedia.org/wiki/Deployments/One_week
2) That message is no longer used by the software, so it is not updated.
3) No, but we are hoping to get back to daily updates in the next 12 months.