They do it all the time. Spanish, same as all other languages is not fixed, but evolves and modifies itself through time. New words appear, and when they are used by the population so much that it becomes part of the language, it can also be adopted "oficially" by "La Real Academia Española".
Chat with our AI personalities
The language is known today as Spanish is derived from a dialect of spoken Latin that evolved in the north-central part of the Iberian Peninsula after the fall of the Western Roman Empire in the fifth century.