@ppelberg I'm moving this to External on Wikimedia-Site-requests, as I know your team usually handles those requests directly. If it's fine to deploy DiscussionTools to any project which asks for it, let me know!

Change 660873 had a related patch set uploaded (by Bartosz Dziewoński; owner: Bartosz Dziewoński):
[operations/mediawiki-config@master] Enable DiscussionTools as a beta feature on 3 wikis per request

https://gerrit.wikimedia.org/r/660873

Scheduled for today: https://wikitech.wikimedia.org/wiki/Deployments#deploycal-item-20210201T1900

Note that kuwiki is not called out in that patch, because we're enabling DiscussionTools there as part of T272639, but that is also happening today.

Change 660873 merged by jenkins-bot:
[operations/mediawiki-config@master] Enable DiscussionTools as a beta feature on 3 wikis per request

https://gerrit.wikimedia.org/r/660873

Mentioned in SAL (#wikimedia-operations) [2021-02-01T19:14:56Z] <urbanecm@deploy1001> Synchronized wmf-config/InitialiseSettings.php: 6360e7899b7dedc29941783b1cdf76df8db073d7: Enable DiscussionTools as a beta feature on 3 wikis per request (T258554; T265829; T273192) (duration: 01m 04s)

The reply tool can now be enabled in beta features. It seems to work! (e.g. https://ku.wikipedia.org/wiki/Gotûbêj:Destpêk, https://ku.wiktionary.org/wiki/Gotûbêj:Destpêk). It also works fine when using the Arabic language variant (e.g. https://ku.wiktionary.org/w/index.php?title=Gotûbêj:Destpêk&variant=ku-arab).