[Tails-l10n] [fr] How to translate "Addtional software" and …

Hi all,

In French Tails, all softwares are in French, except new features from
Tails 3.9 "Additional software" and "Unlock VeraCryp Volumes" (and for
now Thunderbird cause bug #15942)

All others softwares are automatically in french when we start Tails in
French. How can we make the same for these two new features?

Thanks!


--
Chre