I just took a closer look at indicator-sound, and indeed I saw the line "X-Ubuntu-Use-Langpack: yes" which was added at the latest upload on 2017-08-29. And the translation template is present in artful, but not in bionic.
@Sebastien: Someone must have deleted it; I can't see another explanation. I made an attempt to upload the template manually, but that seems to not have worked. Maybe another upload - just a no-change rebuild? - is needed to make LP acknowledge the template for bionic. @Sebastien: We need your advice here. Are no-change rebuilds necessary, or is there a better way? @Simon: As regards the unity-* packages: Yeah, I would like to see a full list too. Just noticed that unity-control-center has that line, but the unity package has not... Possibly we need to upload all packages, whether that line is already there or not, and add it if it isn't there. But let's await Seb's response before proceeding. ** Also affects: unity (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1760435 Title: Use Ubuntu language packs for various indicators To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-datetime/+bug/1760435/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs