|Central Leonhard Schultze River|
|Sepik River basin, Papua New Guinea|
The Walio languages are a small family of clearly related languages,
However, they are not close: Walio and Yawiyo have only a 12% lexical similarity. They are frequently classified among the Sepik languages of northern Papua New Guinea, though Glottolog leaves them out. Glottolog 3.4 classifies the Walio languages as an independent language family.