[out:xml][timeout:3600]; ( relation(4755951)['wikipedia'='en:River Cities Speedway']; ); (._;>;); out meta qt;//['wikipedia tag links to 404']
[out:xml][timeout:3600]; ( relation(11135891)['wikidata'='Q17280755']['wikipedia'='en:Spirit Lake Tribe']; relation(2307085)['wikidata'='Q20821045']['wikipedia'='en:U.S. Route 2']; ); (._;>;); out meta qt;//['wikipedia wikidata mismatch']
[out:xml][timeout:3600]; ( way(961758752)['species:wikidata'='lion']; way(961758753)['species:wikidata'='warthog']; way(961758754)['species:wikidata'='penguin']; way(961758757)['species:wikidata'='okapi']; way(961758759)['species:wikidata'='red kangaroo']; way(961762299)['species:wikidata'='giraff']; way(961762300)['species:wikidata'='bear']; way(961762302)['species:wikidata'='red panda']; way(961762305)['species:wikidata'='zebra']; way(961762306)['species:wikidata'='porkupine']; way(961762311)['species:wikidata'='wolf']; way(961762313)['species:wikidata'='leopard']; way(962021989)['species:wikidata'='Bongo']; way(962029618)['species:wikidata'='southern ground hornbill']; ); (._;>;); out meta qt;//['malformed secondary wikidata tag - for species 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.