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Licence templates on de.wikipedia are note recognized. Examples:
{{Bild-CC-by-sa/3.0/de}}
{{Bild-CC-by-sa/3.0}}
{{Bild-GFDL-Neu}}

From https://de.wikipedia.org/wiki/Datei:2014_-_Olympic_Stadium_%28Athens%29.JPG

More to be found in the category for those templates: https://de.wikipedia.org/wiki/Kategorie:Vorlage:Lizenz_f%C3%BCr_Bilder

https://de.wikipedia.org/wiki/Datei:2014_-_Olympic_Stadium_%28Athens%29.JPG#mediaviewer/Datei:2014_-_Olympic_Stadium_%28Athens%29.JPG

MediaViewer relies on [[commons:COM:MRD]]-style notation to parse license information and other metadata. [[mw:Multimedia/Media_Viewer/Template_compatibility]] has some more information on how to make templates compatible.

*** This bug has been marked as a duplicate of bug 69496 ***

https://de.wikipedia.org/w/api.php?action=query&prop=imageinfo&iiprop=extmetadata&format=xml&titles=File:2014_-_Olympic_Stadium_%28Athens%29.JPG