Comment 2 for bug 1813502

I dont think its a good idea to have @name_suffix@ for the translators to translate in case they translate it incorrectly.

Maybe instead have two seperate strings for the translators to translate:

    @name@ = "Backups"
    @name_suffix@ = " (Devel)"

    Name=@name@@name_suffix@

That way the translators dont have to deal with variable names and only have to translate:
"Backups"
" (Devel)"

Or only "Backups" in case you want " (Devel)" to always be the same.

Or perhaps have 2 .desktop files instead:

org.gnome.DejaDup.desktop:

    Name=Backups

org.gnome.DejaDup-Devel.desktop:

    Name=Backups (Devel)