[out:xml][timeout:3600]; ( node(1386195653)['information'='board']['wikipedia'='de:B-Turm']; ); (._;>;); out meta qt;//['information board with wikipedia tag, not subject:wikipedia']
[out:xml][timeout:3600]; ( node(11065435376)['brand:wikidata'='E Bike Ladestation']; ); (._;>;); out meta qt;//['malformed secondary wikidata tag - for brand 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.