In this Oct. 28, 2015 photo, a Brazilian Pataxo indigenous woman attends the World Indigenous Games in Palmas, Brazil. Of the estimated 2,000 indigenous languages thought to have been spoken in pre-Columbian times in what is now Brazil, only around 160 survive today. Portuguese is now the first language of most members of the Pataxo nation. (Eraldo Peres/Associated Press)

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