Official Languages:
* Spanish (Castilian): The most widely spoken language, with over 47 million speakers in Spain and millions more worldwide.
* Portuguese: Spoken by over 10 million people in Portugal.
* Catalan: Spoken by over 7.5 million people in Catalonia, Valencia, and the Balearic Islands.
* Galician: Spoken by over 2.4 million people in Galicia.
* Basque: Spoken by around 750,000 people in the Basque Country, a region straddling the border between Spain and France.
* Aranese: A variety of Occitan spoken in the Val d'Aran in the Pyrenees Mountains.
Other Languages:
* Occitan: A Romance language spoken in various regions of southern France, with a small community of speakers in the Pyrenees Mountains in Spain.
* Astur-Leonese: A Romance language spoken in northwestern Spain, with around 100,000 speakers.
* Fala: A Romance language spoken in the municipality of El Bierzo in Spain.
* Romani: A language spoken by Roma people throughout the Iberian Peninsula and the world.
* Arabic: Spoken by a significant minority in Spain, particularly in Andalusia.
It's important to note that language use in the Iberian Peninsula is complex and diverse. Many people are bilingual or multilingual, speaking more than one of these languages. Additionally, there are regional variations and dialects within each language.