[out:xml][timeout:3600]; ( node(9051622166)['wikipedia'='sr:%D0%A1%D1%82%D0%B0%D0%B1%D0%BD%D0%B0']; ); (._;>;); out meta qt;//['wikipedia tag links to 404']
[out:xml][timeout:3600]; ( node(9970626423)['wikidata'='Q165137']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to an animal or plant (and not an individual one)']
[out:xml][timeout:3600]; ( node(4317197310)['wikidata'='Q12631219']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to a human']
[out:xml][timeout:3600]; ( relation(4098902)['wikidata'='Q19247732']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to a conflict']
[out:xml][timeout:3600]; ( way(186817704)['wikidata'='Q90901563']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikidata tag to a religious denomination']
[out:xml][timeout:3600]; ( node(10879170567)['wikidata'='Q121418883']['wikipedia'='bs:Crvena stijena (Crna Gora)']; node(255351703)['wikidata'='Q200733']['wikipedia'='sr:Nikšić']; node(255352645)['wikidata'='Q390605']['wikipedia'='sr:Plužine']; node(428001652)['wikidata'='Q187381']['wikipedia'='sr:Zelenika']; relation(10461485)['wikidata'='Q788450']['wikipedia'='en:Zupci']; way(23570249)['wikidata'='Q2118911']['wikipedia'='sr:Tunel Vrmac']; way(961707114)['wikidata'='Q252273']['wikipedia'='en:Duklja']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( way(219103093)['brand:wikidata'='Q14915070']['brand:wikipedia'='en:Telenor']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for brand prefixed tags']
[out:xml][timeout:3600]; ( node(3517654451)['wikidata'='Q27567287']['wikipedia'='ceb:Simova Pećina']; ); (._;>;); out meta qt;//['wikipedia tag links bot wikipedia']
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.