Andean Spanish is a dialect of Spanish spoken in the central Andes, from western Venezuela, southern Colombia, with influence as far south as northern Chile and Northwestern Argentina, passing through Ecuador, Peru, and Bolivia. It is influenced principally by Castilian, Canarian and Andalusian Spanish, which is favoured in the cities, but in rural areas and some cities, there is influence of Quechua, Aymara, and other indigenous languages.
In northwest Argentina and northern Chile today, it is possible to say that there is a certain fusion in the dialects of both countries, but the local dialects are more dominant.
The Andean dialect can be heard in the northeast, with respect to the pronunciation and lexicon. The Rioplatense dialect provides some of the pronunciation, a variety of modes, and the Argentine dialect.
Rioplatense replaces the Andean use of "tú" as the second person singular familiar pronoun with "vos". It is very similar in Chile, but "tú" and "vos" are there both used as the singular familiar second-person pronoun. Also, there is influence of Chilean Spanish and some Andean Spanish.