Numista uses regions for write address in outings, issuing entities, and other pages.
In Spain there are two levels of administrative divisions:
- the autonomous communities https://en.wikipedia.org/wiki/Autonomous_communities_of_Spain (there are autonomous communities with one or more provinces),
- the provinces https://en.wikipedia.org/wiki/Provinces_of_Spain (and Ceuta, and Melilla).
Numista uses the autonomous communities as region to write address, but address in Spain are written with the province. For example:
- https://en.numista.com/catalogue/issuing_entity.php?id=2515
Displays: Valladolid, Castille and León, Spain
This would be more correct: Valladolid, Spain
(the city of Valladolid is the capital of the province of Valladolid, part of the autonomous community of Castille and León) - https://en.numista.com/catalogue/issuing_entity.php?id=4244
Displays: Vilaseca, Catalonia, Spain
This would be more correct: Vilaseca, Tarragona, Spain
(the municipality of Vilaseca is located in the province of Tarragona, part of the autonomous community of Catalonia).
My suggestion is use the province instead of the autonomous community as region of Spain. This may be complex to implement, but I think it should taken into account.