* Spanish (also known as Castilian) is the official language of Spain and is spoken by the vast majority of the population.
* Basque (also known as Euskara) is a language isolate, meaning it is not related to any other known language. It is spoken in the Basque Country, which includes Pamplona.
While Spanish is the dominant language, a significant portion of the population in Pamplona is bilingual in both Spanish and Basque.