[out:xml][timeout:3600]; ( node(2139794101)['wikidata'='Q56062081']['wikipedia'='de:Königlich-Sächsische Triangulirung']; relation(16244516)['wikidata'='Q1203737']['wikipedia'='de:Bahnstrecke Bayreuth–Warmensteinach']; relation(275328)['wikidata'='Q106049555']['wikipedia'='de:Frankenweg']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( relation(3633213)['wikidata'='Q405356']['wikipedia'='de:Ailsbach']; ); (._;>;); 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.