[MM3-users] List notices in French, but subject in English

Hi,

I have a list set with it's preferred language set as French and the body of the standard notification emails (eg. Welcome message) is correctly sent in French, however the subject of the emails is in English.

Can the list be configured so the subject is also in French, or is this an issue with gettext .mo files somewhere?

This is on Debian package Mailman 3.3.3

Thanks, Mark