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Wikidata links to Commons should appear in Special:WhatLinksHere
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Description

When Wikidata links to a file in Wikimedia Commons, Special:WhatLinksHere on Commons currently does not display the usage. For example, Wikidata Lexeme:L99-F1 links to Wikimedia Commons File:De-Luftballons.ogg but the Wikidata page is not listed on Special:WhatLinksHere/File:De-Luftballons.ogg. Displaying such reverse links would be useful for maintenance.

Event Timeline

Hm... in the sidebar on Wikimedia Commons (see screenshot), would it perhaps make sense to replace the link to Special:WhatLinksHere by a link to Special:GlobalUsage? Currently, there seems to be a usability/UX issue: the feature is already implemented (thanks for the kind explanation on this bug, I had no idea!). However, people may might never come across the Special:GlobalUsage unless they already know that it exists. Hence the suggestion to remove “What links here” from the sidebar and replace it by “Global usage” which seems to be a superset. (There’s a risk of cluttering the user experience when the sidebar has too many links).

Another potential solution for the discoverability issue might be to place a prominent banner (or header, etc.) on Special:WhatLinksHere, warning people that the displayed content is only within inside the same project. The explanation text could point people to Special:GlobalUsage.

Even that doesn't seem necessary to me, the list is already available on every file page.

See also T3886: A cross-wiki "What links here" (aggregate local iwbacklinks from wikis). Although I'm more fond of a dedicated special page such as Special:EntityUsage.