[out:xml][timeout:3600]; ( way(1250283229)['wikipedia'='de:Fritz_Koenig']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia tag to a human']
[out:xml][timeout:3600]; ( relation(11088951)['wikidata'='Q2240424']['wikipedia'='de:Schloss Bruckberg']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - wikipedia points to disambiguation page and wikidata does not']
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.