El Principito — in Rioplatense Castilian.

Rioplatense Castilian, is a variety of Spanish spoken mainly in Argentina and Uruguay. The word employed to name the Spanish language in Argentina is castellano (English: Castilian) and in Uruguay, español (English: Spanish).

As Rioplatense is considered a dialect of Spanish and not a distinct language, there are no credible figures for a total number of speakers. The total population of these areas would amount to some 25–30 million, depending on the definition and expanse.