[out:xml][timeout:3600]; ( node(4322352014)['wikidata'='Q18880407']['wikipedia'='en:Monument au Fantôme']; way(15307666)['wikidata'='Q32827132']['wikipedia'='en:Barker Reservoir']; way(510322923)['wikidata'='Q3341282']['wikipedia'='en:Esperson Buildings']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( node(9722242735)['brand:wikidata'='Q7405065']['not:brand:wikidata'='Q7405065']; ); (._;>;); out meta qt;//['wikipedia/wikidata type tag that is incorrect according to not:* tag']
[out:xml][timeout:3600]; ( node(9382821118)['operator:wikidata'='Q259195']['operator:wikipedia'='en:Exelon']; node(9382821119)['operator:wikidata'='Q259195']['operator:wikipedia'='en:Exelon']; node(9382821120)['operator:wikidata'='Q259195']['operator:wikipedia'='en:Exelon']; node(9382821121)['operator:wikidata'='Q259195']['operator:wikipedia'='en:Exelon']; way(802630636)['operator:wikidata'='Q1029560']['operator:wikipedia'='en:Houston Independent Schoo District']; ); (._;>;); 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.