[out:xml][timeout:3600]; ( way(102658969)['wikidata'='Q1425545']['wikipedia'='de:Johannes a Lasco']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( node(13013542709)['artist:wikipedia'='https://de.wikipedia.org/wiki/Georg_Schmidt-Westerstede']; way(1243681837)['artist:wikipedia'='https://de.wikipedia.org/wiki/Georg_Schmidt-Westerstede']; ); (._;>;); out meta qt;//['malformed secondary wikipedia tag - for artist prefixed tags']
[out:xml][timeout:3600]; ( relation(2117285)['operator:wikidata'='Q124369334']['operator:wikipedia'='de:Avacon']; relation(2310598)['operator:wikidata'='Q124369334']['operator:wikipedia'='de:Avacon']; relation(2310599)['operator:wikidata'='Q124369334']['operator:wikipedia'='de:Avacon']; relation(978884)['operator:wikidata'='Q124369334']['operator:wikipedia'='de:Avacon']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for operator prefixed tags']
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.