It seems useful to show page previews for articles of sister projects, too. In particular, this is useful for non-Wikipedia projects which use information from Wikipedias. Readers cannot distinguish between in-project and sister-project links, and they wonder why page previews do not work.
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Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 19 2021, 6:12 AM2021-08-19 06:12:10 (UTC+0)
Jdlrobson closed this task as a duplicate of T67117: Hovercards: Display popups across wikis (interwiki popups).Aug 19 2021, 1:57 PM2021-08-19 13:57:43 (UTC+0)