IIRC, “Spain”, like “Germany”, was a geographic name long before it identified a particular polity.
In any case it's a geographic name coextensive with a modern polity now, and a modern speaker using it to identify a geographic location even for events that predate the modern polity is normal and clear.
Hispania != Spain. In any case, the westernmost region on the Iberian peninsula was and still is occupied by a country then known and still known as Portugal.
