wikidata vs brand:wikidata
Can we have an additional validator to check for wikidata values that are related to the brand (or the operator) and not to the feature itself ?
The validator can then propose to change the wikidata
tag to brand:wikidata
https://wiki.openstreetmap.org/wiki/Key:brand:wikidata
The wikipedia Improvment tasks page on the wiki give a few hints about how to gather the errors : https://wiki.openstreetmap.org/wiki/Wikipedia_Link_Improvement_Project#Brands