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.
It is spoken by 4.6 million people in Paraguay, Argentina, Bolivia, and Brazil (Ethnologue). These languages are spoken by people who inhabit a vast area in the Amazon forest in Brazilian states and Paraguay in the south, and from the Atlantic coast in the east to the Andes of Bolivia and Peru in the west.