The MultimediaViewer message multimediaviewer-optin-pref was accidentally deleted in rEMMV8022a88a7efc: Image Carousel: enable via beta feature (T426225), and translatewiki subsequently pruned its ~91 translations from the repository. The message has now been restored in en.json and qqq.json by https://gerrit.wikimedia.org/r/1300890 (T428742); the other language files must not be edited in-repo, so we'd like to ask the translatewiki maintainers to restore the pruned translations from the translatewiki side if possible.

Technical notes

The message keys should all be identical, so hopefully a straightforward restoration is possible. The deletion shipped around 2026-05-21; pruning happened in subsequent l10n updates.