Basques were living in western Europe long before the migrations of the second millennium B.C. that established the ethnic composition of modern Europe. The Basques are the oldest indigenous people of western Europe. https://nabasque.eus/origins.html
Euskara, the Basque language, remains the only non-Indo-European language -- and the oldest language -- in western Europe. It's nothing like French or Spanish. It precedes these derivatives of Latin, the language of the Romans, by at least 3,000 years.
