Other languages:

MediaWiki:Youhavenewmessages provides the MediaWiki "new messages" message. The default is:

You have $1 ($2).

where $1 is taken from MediaWiki:Newmessageslinkplural, while $2 comes from MediaWiki:Newmessagesdifflinkplural.

You have a new message (last change).

MediaWiki:Youhavenewmessagesfromusers is a variation when there are messages from multiple users:

You have $1 from $3 users ($2).

where $3 is the number of users who have left messages.

You have new messages from 2 users (last changes).