Rioplatense Spanish

Rioplatense Spanish (/ˌriːoʊpləˈtɛnseɪ/), also known as Rioplatense Castilian, River Plate Spanish, or Argentine Spanish, is a variety of Spanish originating in and around the Río de la Plata Basin, and now spoken throughout most of Argentina and Uruguay. It is the most prominent dialect to employ voseo (the use of vos in place of the pronoun tú, along with special accompanying conjugations) in both speech and writing. Many features of Rioplatense are also shared with the varieties spoken in south and eastern Bolivia, and Paraguay. This dialect is often spoken with an intonation resembling that of the Neapolitan language of Southern Italy, but there are exceptions.

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.