Castellón de la Plana, or simply Castellón is the capital city of the province of Castellón, in the Valencian Community, Spain. It is located in the east of the Iberian Peninsula, on the Costa del Azahar by the Mediterranean Sea. The mountain range known as Desert de les Palmes rises inland north of the town.

Valencian or the Valencian language is the official, historical and traditional name used in the Valencian Community of Spain to refer to the Romance language also known as Catalan, either as a whole or in its Valencia-specific linguistic forms. The Valencian Community's 1982 Statute of Autonomy and the Spanish Constitution officially recognise Valencian as the name of the regional language.