[out:xml][timeout:3600]; ( node(5174406543)['wikipedia'='de:Heidelberger Kreis (Vortragsgesellschaft)']; way(339124364)['wikipedia'='de:Wasserturm (Eppelheimer Straße)']; ); (._;>;); out meta qt;//['wikipedia tag links to 404']
[out:xml][timeout:3600]; ( node(5316446086)['brand:wikipedia:de'='Freenet_AG']; ); (._;>;); out meta qt;//['invalid old-style wikipedia tag']
[out:xml][timeout:3600]; ( way(1019452098)['name:etymology:wikidata'='Q268702']['name:etymology:wikipedia'='de:Mary Somerville']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - wikipedia points to disambiguation page and wikidata does not - for name:etymology prefixed tags']
[out:xml][timeout:3600]; ( node(8712348503)['operator:wikidata'='Q41171672']['operator:wikipedia'='de:Aldi Süd']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for operator prefixed tags']
[out:xml][timeout:3600]; ( relation(9255801)['network:wikidata'='Q15712258']['network:wikipedia'='en:Flixbus']; relation(9262564)['network:wikidata'='Q15712258']['network:wikipedia'='en:Flixbus']; relation(9691936)['network:wikidata'='Q15712258']['network:wikipedia'='en:Flixbus']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for network prefixed tags']
[out:xml][timeout:3600]; ( way(1164649008)['name:etymology:wikidata'='Q94748665']['name:etymology:wikipedia'='de:Marie Clauss']; way(848303438)['name:etymology:wikidata'='Q134661']['name:etymology:wikipedia'='de:George Bool']; way(939493365)['name:etymology:wikidata'='Q94748665']['name:etymology:wikipedia'='de:Marie Clauss']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch - for name:etymology 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.