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 addition to Spain, Spanish is the official language of Argentina, Bolivia, Chile, Colombia, Costa Rica, Cuba, the Dominican Republic, Ecuador, El Salvador, Equatorial Guinea, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Uruguay, and Venezuela.