Diccionario de la lengua española 22 ed. (2001). The Diccionario de la lengua española is the standard dictionary of Spanish (a.k.a. Castilian) edited and produced by the Royal Spanish Academy (RAE). Its first edition dates from 1780, and its latest one is the 23rd edition published in 2014. The online version is comprised of the 22nd edition plus some of the work done for the 23rd edition. DLE is considered the most authoritative dictionary for the Spanish language. It includes commonly used words in any of the Spanish speaking countries. It also includes numerous archaic and unusual words with aims of understanding ancient Spanish literature.