A Spaniard cannot vote for a Finnish MEP, and a Finn cannot vote for a Spanish party.
Note that there’s no requirement of national citizenship to vote for MEPs. So a Spaniard who lives in Finland can choose to vote for a Finnish MEP, instead of voting for a Spanish MEP.
Note that there’s no requirement of national citizenship to vote for MEPs. So a Spaniard who lives in Finland can choose to vote for a Finnish MEP, instead of voting for a Spanish MEP.