[out:xml][timeout:3600]; ( node(3095252605)['wikidata'='Q77269']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to a human']
[out:xml][timeout:3600]; ( node(5712398538)['wikidata'='Q639194']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia and wikidata tag to a software']
[out:xml][timeout:3600]; ( way(103559146)['wikidata'='Q57996268']['wikipedia'='de:Liste der Naturdenkmale in Tengen']; way(199920687)['wikidata'='Q57996266']['wikipedia'='de:Liste der Naturdenkmale in Tengen']; way(301858260)['wikidata'='Q67772739']['wikipedia'='de:Schloss Bohlingen']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( node(6287319321)['information'='board']['wikipedia'='de:Kriegerdenkmal (Radolfzell)']; ); (._;>;); out meta qt;//['information board with wikipedia tag, not subject: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.