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 Touch seeded packages, which is subscribed to indicator-datetime in Ubuntu. https://bugs.launchpad.net/bugs/1760435 Title: Use Ubuntu language packs for various indicators Status in indicator-datetime package in Ubuntu: Confirmed Status in indicator-messages package in Ubuntu: Invalid Status in indicator-power package in Ubuntu: Invalid Status in indicator-session package in Ubuntu: Invalid Status in indicator-sound package in Ubuntu: Invalid Status in unity package in Ubuntu: New Bug description: The Unity family of packages was previously part of standard Ubuntu. Thus all the translation templates were made available to the translators via Launchpad, and the translations were included in the language packs. Since those packages are no longer part of standard Ubuntu, they have been moved from main to universe. And translations are dropped. At the moment, it is feasible for us to keep using langpacks. That means adding "X-Ubuntu-Use-Langpack: yes" to their debian/control and doing an upload. See: https://community.ubuntu.com/t/translation-of-unity-packages/4919 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-datetime/+bug/1760435/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp