Eduardo Ribeiro of the University of Chicago finds no evidence to classify Fulniô (Yatê) or Guató as Macro-Je, pace Kaufman, nor Otí and Chiquitano, pace Greenberg.
These languages share irregular morphology with the Tupi and Carib families, and Rodrigues (2000) and Ribeiro connect them all as a Je-Tupi-Carib family.