The Kawahíwa people started moving to Rondônia from Mato-Grosso, by the second half of the 18th century, and they definitively started separating from each other. The Parintintín, Tenharin and Djiahúj (Diahói) were one group at that time, and then they split in three different groups. Their languages are still very close, but their own feeling is that they speak different languages although they are intelligible. There are also lexical differences, different idioms, and morphosyntactic differences as well. And they are also differentiated culturally from each other in some aspects. Tenharin is the only language that is still spoken as the main language of communication by old people, and by some young people as well. (Personal communication, Ana Suelly Arruda Câmara Cabral, 2016.)