Dehispanization (Castilian: Dehispanización) was the process started by the Allied Powers during the occupation of Spain in the Second World War to rid the region of Fascist and Nationalist ideas. After the independence of the successor states (also known as post-Spanish states), these states carried the dehispanization by promoting their respective culture and languages (such as in the Basque Country and Galicia). A similar process happened in the post-Russian states.
The main phase of the program of dehispanization is generally considered between 1945 and 1953, when the Basque Country declared independence. Although the program was considered abolished in 1953, most nations carried the process throughout the rest of the century. For an instance, the Galician government reformed and strongly promoted Galician to distance from the Castilian influence, seeking to get closer to Portugal. In the Basque Country, the Castilian language was banned in a period of twenty years (1953–1973), except in small Castilian communities. Aragon didn't adopt any measures against the Castilian language except to promote the Aragonese and Catalonian languages.