[out:xml][timeout:3600]; ( relation(132384)['wikidata'='Q106066633']['wikipedia'='de:Jakobsweg']; relation(1755977)['wikidata'='Q803079']['wikipedia'='de:Bahnstrecke Regensburg–Passau']; way(143184791)['wikidata'='Q63533152']['wikipedia'='de:Birkensee (Nürnberger Land)']; way(30086055)['wikidata'='Q800913']['wikipedia'='de:Bahnhöfe in Hersbruck']; way(30880706)['wikidata'='Q41390940']['wikipedia'='de:Rockenbrunn']; way(31552964)['wikidata'='Q880228']['wikipedia'='de:Wichernhaus (Altdorf)']; way(38130344)['wikidata'='Q41385385']['wikipedia'='de:Amtsgericht Hersbruck']; way(92417158)['wikidata'='Q41390790']['wikipedia'='de:Liste der Baudenkmäler in Pommelsbrunn']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( node(2617669144)['wikipedia'='Datei:Feucht Bogen 03.jpg']; ); (._;>;); out meta qt;//['malformed wikipedia tag']
[out:xml][timeout:3600]; ( node(1135759580)['information'='board']['wikipedia'='de:KZ-Außenlager Hersbruck']; node(1135759602)['information'='board']['wikipedia'='de:KZ-Außenlager Hersbruck']; node(1135759632)['information'='board']['wikipedia'='de:KZ-Außenlager Hersbruck']; node(1135759639)['information'='board']['wikipedia'='de:KZ-Außenlager Hersbruck']; node(1492441960)['information'='board']['wikipedia'='de:Vittore Bocchetta']; node(1585670307)['information'='board']['wikipedia'='de:KZ-Außenlager Hersbruck']; node(3149341163)['information'='board']['wikipedia'='de:Burgstall Hacburg']; node(622580569)['information'='board']['wikipedia'='de:Houbirg']; node(622591371)['information'='board']['wikipedia'='de:Houbirg']; ); (._;>;); out meta qt;//['information board with wikipedia tag, not subject:wikipedia']
[out:xml][timeout:3600]; ( relation(15708762)['network:wikidata'='Q2516463']['not:network:wikidata'='Q2516463']; ); (._;>;); out meta qt;//['wikipedia/wikidata type tag that is incorrect according to not:* tag']
[out:xml][timeout:3600]; ( node(8866203553)['operator:wikidata'='Q41171672']['operator:wikipedia'='de:Aldi Süd']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for operator 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.