Question:  Cuyo Spanish was influenced by a dialect of the Spanish language spoken mainly in the areas in and around what Basin?
Context: "Rioplatense" Spanish (Spanish: "español rioplatense" , locally "castellano rioplatense") is a dialect of the Spanish language spoken mainly in the areas in and around the Río de la Plata Basin of Argentina and Uruguay.  It is also referred to as "River Plate Spanish" or "Argentine Spanish".  Being the most prominent dialect to employ "voseo" in both speech and writing, many features of Rioplatense are also shared with the varieties spoken in Eastern Bolivia, Chile, and Peru.  This dialect is often spoken with an intonation resembling that of the Neapolitan language of Southern Italy, but there are exceptions.  The usual word employed to name the Spanish language in this region is "castellano" (English: Castilian ) and seldom "español" (English: "Spanish" ; see Names given to the Spanish language). The Satsugū dialect (薩隅方言 , Satsugū Hōgen ) , often referred to as the Kagoshima dialect (鹿児島弁 , Kagoshima-ben, Kagomma-ben, Kago'ma-ben, Kagoima-ben ) , is a group of dialects or dialect continuum of the Japanese language spoken mainly within the area of the former Ōsumi and Satsuma provinces now incorporated into the southwestern prefecture of Kagoshima.  It may also be collectively referred to as the Satsuma dialect (薩摩方言 "Satsuma Hōgen" or 薩摩弁 "Satsuma-ben"), owing to both the prominence of the Satsuma Province and the region of the Satsuma Domain which spanned the former Japanese provinces of Satsuma, Ōsumi and the southwestern part of Hyūga.  Although not classified as a separate language, the Satsugū dialect is commonly cited for its mutual unintelligibility to even its neighbouring Kyūshū variants.  It shares over three-quarters of the Standard Japanese vocabulary corpus and some areal features of Kyūshū. Peruvian Ribereño Spanish or Peruvian Coastal Spanish is the form of the Spanish language spoken in the coastal region of Peru.  The Spanish spoken in Coastal Peru has four characteristic forms today: the original one, that of the inhabitants of Lima (known as "limeños") near the Pacific coast and parts south, (formerly from the old section of the city from where it spread to the entire coastal region); the inland immigrant sociolect (more influenced by Andean languages); the Northern, in Trujillo, Chiclayo or Piura; and the Southern.  The majority of Peruvians speak Peruvian Coast Spanish, as Peruvian Coast Spanish is the standard dialect of Spanish in Peru. Gipuzkoan (Gipuzkera in Basque, Guipuzcoano in Spanish) is a dialect of the Basque language spoken mainly in the province of Gipuzkoa in Basque Country but also in a small part of Navarre.  It is a central dialect, spoken in the central and eastern part of Gipuzkoa.  In the traditional dialectal classification of the language based on research carried out by Lucien Bonaparte in the 19th century, the varieties of the valleys Sakana and Burunda are also included in Gipuzkoan, while this approach has been disputed by modern Basque linguists. The Northumbrian language or Northumbria English is an English language or dialect of English (""Northumbrian Language"" may only refer to the broadly spoken Northumbrian whereas Northumbrian English may just refer to the Standard English as spoken in Northumbria and featuring various Northumbrian words and forms), and a variant of Northern English with the Geordie dialect being one of the subsets of Northumbrian the others being Northern (north of the River Coquet), Western (from Allendale through Hexham up to Kielder), Southern or Pitmatic (the mining towns such as Ashington and much of Durham) Mackem (Wearside), Smoggie (Teesside) and possibly also Tyke (Yorkshire).  It is spoken mainly if not exclusively in the modern day counties of Northumberland and Durham.  Whilst all sharing similarities to the more famous Geordie dialect and most of the time not distinguishable by non-native speakers, there are a few differences between said dialects not only between them and Geordie but also each other. Romano-Greek (also referred to as Hellenoromani; ) is a nearly extinct mixed language (referred to as Para-Romani in Romani linguistics), spoken by the Romani people in Greece that arose from language contact between Romani speaking people and the Greek language.  The language is expected to be a secret language spoken in Thessaly and Central Greece Administrative Unit.  Typologically the language is structured on Greek with heavy lexical borrowing from Romani.  Related variants of this language are Dortika.  Dortika is a secret language spoken mainly in Athens by traveling builders from Eurytania Prefecture.  In both cases, the languages are most likely not native to their speakers. The Kumanovo dialect (Macedonian: Кумановски дијалект , "Kumanovski dijalekt") is a member of the eastern subgroup of the Northern group of dialects of the Macedonian language.  It belongs to the so-called Prizren-Timok dialects, also known as Torlakian.  The dialect is typical for the northern dialect of the Macedonian language and is very well known because of the use of some cases, such as the locative case.  The Kumanovo dialect is spoken mainly in the city of Kumanovo and the surrounding villages.  The dialect is closely related with the neighboring Kriva Palanka dialect.  The Kumanovo dialect can be found in the literal works, such as the famous play Lenče Kumanovče written by Vasil Iljoski in 1928.  The Kumanovo dialect is especially popular sources of humor in the spoken media, whereas the print media tend to favor West dialect forms forhumorous anecdotes, quotations in local news stories.  The most significant example where Kumanovo dialect is used in humorous way is the festival "Tumba Fest". The Karaim language (Crimean dialect: къарай тили , Trakai dialect: "karaj tili ", Turkish dialect: "karay dili ", traditional Hebrew name "lashon kedar " לשון קדר "language of the nomads") is a Turkic language with Hebrew influences, in a similar manner to Yiddish or Judaeo-Spanish.  It is spoken by only a few dozen Crimean Karaites ("Qrimqaraylar ") in Lithuania, Poland and Crimea and Galicia in Ukraine.  The three main dialects are those of Crimea, Trakai-Vilnius and Lutsk-Halych all of which are critically endangered.  The Lithuanian dialect of Karaim is spoken mainly in the town of Trakai (also known as "Troki") by a small community living there since the 14th century. Equatorial Spanish, also called "Coastal Colombian-Ecuadorian" dialect or "Chocoano", is a dialect of Spanish spoken mainly in the coastal region of Ecuador, as well as in the bordering coastal areas of northern Peru and southern Colombia.  It is considered to be transitional between the Caribbean dialects and the Peruvian Coast varieties.  The major influential linguistic centers are Guayaquil and Buenaventura.  There is an important subvariety of this dialect which is spoken by most of the communities of African descent dwelling on the border between coastal Colombia (Chocó department) and Ecuador (Esmeraldas province), and which is said to reflect African influence in terms of intonation and rhythm. Cuyo Spanish or Cuyano Spanish (Español Cuyano) is the dialect of Spanish that evolved in the historical province of Cuyo and that is now spoken in the Argentine provinces of Mendoza and San Juan.  To a lesser extent it is also spoken in the provinces of San Luis and La Rioja.  Cuyo Spanish shares a series of common traits with Chilean Spanish due to settlement history and commercial ties.  Later on, under the Argentine Republic Rioplatense Spanish, the dialect of Buenos Aires and Uruguay influenced Cuyo Spanish.
Answer: Río de la Plata Basin