The predominantly spoken language in Spain is Spanish, also known as Castilian or "Castellano." Spanish is one of the world's most widely spoken languages, with millions of native speakers across the globe. In Spain, it serves not only as the official language but also as a unifying factor among various regions. Additionally, there are other official languages in certain areas, such as Catalan in Catalonia and Basque in the Basque Country, reflecting Spain's rich cultural and linguistic diversity. As a result, Spanish is not only crucial for national communication but also increasingly important in global contexts.