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 1975 Peru became the first country to recognize Quechua as one of its official languages. Ecuador conferred official status on the language in its 2006 constitution, and in 2009, Bolivia adopted a new constitution that recognized Quechua and several other indigenous languages as official languages of the country.