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Nivaclé is an autonym, meaning "human." They are also known as the Ashlushlay, Axluslay, Chulupí, and Nivaklé people.
Language
They speak the Nivaclé language, which has two dialects: Forest Nivaclé and River Nivaclé. Nivaclé is one of the Mataco-Guaicuru languages. A dictionary has been published for the language, and the Bible was translated into Nivaclé in 1995.