[out:xml][timeout:3600]; ( way(191050835)['name:etymology:wikipedia:missing'='de:Hospital Neuenkirchen (Schwanewede)']; ); (._;>;); out meta qt;//['invalid old-style wikipedia tag']
[out:xml][timeout:3600]; ( relation(300030)['operator:wikidata'='Q1273382']['operator:wikipedia'='de:Tennet TSO']; ); (._;>;); 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.