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.
The languages in this family all have small populations of speakers mostly in Colombia, Brazil, Ecuador. Tupi-Guarani. Tupi languages were spoken south of the Amazon, from the Andes to the Atlantic Ocean and down to the Rio de la Plata. Today, they are spoken by 2.2 million people in Paraguay, Bolivia, and Brazil.