[out:xml][timeout:3600]; ( node(1364700294)['wikidata'='Q1617174']['wikipedia'='de:Hohenburg (Lenggries)']; way(726184795)['wikidata'='Q47339985']['wikipedia'='de:Sylvensteinspeicher']; way(99523239)['wikidata'='Q2241603']['wikipedia'='de:Hohenburg (Lenggries)']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( way(38772686)['operator:wikipedia'='https://de.wikipedia.org/wiki/DB_Energie']; ); (._;>;); out meta qt;//['malformed secondary wikipedia tag - for operator prefixed tags']
[out:xml][timeout:3600]; ( relation(13996526)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(13996527)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(13996528)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(16789281)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(16789282)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(16789283)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(16789285)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; relation(2570705)['network:wikidata'='Q2138493']['network:wikipedia'='de:Münchner Verkehrs- und Tarifverbund']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for network prefixed tags']
JOSM Wikipedia plugin
Note to self: online version hosted at https://matkoniecz.github.io/OSM-wikipedia-tag-validator-reports, files are stored at https://github.com/matkoniecz/OSM-wikipedia-tag-validator-reports.