MediaViewer provides wrong link on de.wp for commons files when using the "You need to attribute the author" option.
The text produces is:
„Viglius van Aytta“ von Frans Pourbus der Ältere - http://www.insecula.com/oeuvre/photo_ME0000058875.html. Lizenziert unter Public domain über Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Viglius_van_Aytta.JPG#mediaviewer/Datei:Viglius_van_Aytta.JPG
But the last link does not work due to the localized "Datei" for german "File" in it. So, for commons file use the canonical namespace as in the first part of the url.
Bad:
https://commons.wikimedia.org/wiki/File:Viglius_van_Aytta.JPG#mediaviewer/Datei:Viglius_van_Aytta.JPG
Better:
https://commons.wikimedia.org/wiki/File:Viglius_van_Aytta.JPG#mediaviewer/File:Viglius_van_Aytta.JPG
Version: unspecified
Severity: normal