[out:xml][timeout:3600]; ( node(6282433445)['wikipedia'='de:Heinrich Niemöller']; ); (._;>;); out meta qt;//['should use a secondary wikipedia tag - linking from wikipedia tag to a human']
[out:xml][timeout:3600]; ( node(8964371692)['wikidata'='Q1585162']['wikipedia'='de:Hardtberg']; relation(6941191)['wikidata'='Q1619189']['wikipedia'='de:Im Hölken']; way(208134760)['wikidata'='Q1784499']['wikipedia'='de:Gut Am Schaffstal']; way(209289628)['wikidata'='Q64068040']['wikipedia'='de:Roonstraße 41/43 (Wuppertal)']; way(210185128)['wikidata'='Q64482006']['wikipedia'='de:Friedrich-Ebert-Straße 139']; way(210185129)['wikidata'='Q64482006']['wikipedia'='de:Friedrich-Ebert-Straße 139']; way(210185130)['wikidata'='Q64482031']['wikipedia'='de:Friedrich-Ebert-Straße 139']; way(210185138)['wikidata'='Q64481975']['wikipedia'='de:Friedrich-Ebert-Straße 139']; way(210469127)['wikidata'='Q64434097']['wikipedia'='de:Friedrich-Ebert-Straße 139']; way(259153802)['wikidata'='Q63965857']['wikipedia'='de:Gymnasium Bayreuther Straße']; way(80135476)['wikidata'='Q18698549']['wikipedia'='de:Rittergut Schöller']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( way(1037398243)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(1071856871)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(107539617)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(210136536)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(210136541)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(243766935)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(24520717)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(267055147)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(307459757)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(33440175)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(33440176)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(48952379)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(529934861)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(529934863)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(529937872)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(5980164)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; way(5980280)['wikipedia'='Friedrich-Ebert-Straße (Wuppertal)']; ); (._;>;); out meta qt;//['malformed wikipedia tag']
[out:xml][timeout:3600]; ( node(6468235286)['subject:wikipedia'='Q1600239']; ); (._;>;); out meta qt;//['malformed secondary wikipedia tag - for subject prefixed tags']
[out:xml][timeout:3600]; ( node(6253351409)['artist:wikipedia'='https://de.wikipedia.org/wiki/Joseph_Hammerschmidt']; ); (._;>;); out meta qt;//['malformed secondary wikipedia tag - for artist 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.