[out:xml][timeout:3600]; ( way(1007650924)['wikipedia'='de:Kulturstätte Globe']; way(959149596)['wikipedia'='de:Volksschule Coburg-Ketschendorf']; ); (._;>;); out meta qt;//['wikipedia tag links to 404']
[out:xml][timeout:3600]; ( way(143291235)['wikidata'='Q98585598']['wikipedia'='de:Kyrill-Palais']; way(366942622)['wikidata'='Q98587861']['wikipedia'='de:Hofbrauhaus Coburg']; way(48701287)['wikidata'='Q98581787']['wikipedia'='de:Marstall (Coburg)']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( node(3792405653)['wikidata'='Q2242646']['wikipedia'='de:Schloss Neuhof']; ); (._;>;); 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.