The word, tango, is Argentine Spanish and is believed to come from a term describing an African-American drum dance.
Bolivia has three official languages one of which is Spanish. The other are Indian languages one is called Aymara and the other is called Quechua. About one third of the people speak Spanish. But, most natural born Bolivians speak either of the two orignal native languages.
In modern-day Peru, speakers of Aymara are located almost entirely in the deep south, along the border with Bolivia and around Lake Titicaca (where the inhabitants, known as the Uros, of the floating islands speak Aymara). The language is spoken more commonly in Bolivia, where there are two million Aymara speakers.