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.
There is some degree of regional variation within Aymara, but all dialects are mutually intelligible. Most studies of the language focused on either the Aymara spoken on the southern Peruvian shore of Lake Titicaca or the Aymara spoken around La Paz.