Languages: Castilian Spanish (official nationwide) 74%, Catalan (official in Catalonia, the Balearic Islands, and the Valencian Community (where it is known as Valencian)) 17%, Galician (official in Galicia) 7%, Basque (official in the Basque Country and in the Basque-speaking area of Navarre) 2%, Aranese (official in the northwest corner of Catalonia (Vall d'Aran) along with Catalan, <5,000 speakers)
note: Aragonese, Aranese Asturian, Basque, Calo, Catalan, Galician, and Valencian are recognized as regional languages under the European Charter for Regional or Minority Languages
Definition: This entry provides a listing of languages spoken in each country and specifies any that are official national or regional languages. When data is available, the languages spoken in each country are broken down according to the percent of the total population speaking each language as a first language. For those countries without available data, languages are listed in rank order based on prevalence, starting with the most-spoken language.
Source: CIA World Factbook - This page was last updated on January 20, 2018