The Ramu–Lower Sepik Lower Sepik–Ramu languages are a proposed family of about 35 Papuan languages spoken in the Ramu and Sepik river basins of northern Papua New Guinea. These languages tend to have simple phonologies, with few consonants or vowels and usually no tones. Overview Two primary branches are typically accepted: Lower Sepik (Nor–Pondo) Ramu However, Foley (2018) also considers the possibility of Grass being a third primary branch. Usher classifies some of the Grass languages (the Keram languages) as being coordinate with Ramu, and some (the Porapora languages) as being part of Ramu. The relatedness of the three branches are held together by morphological evidence, as very few lexical cognates are shared among them. The family was proposed by William A. Foley and accepted by Malcolm Ross. Its two branches, Ramu and Lower Sepik, had belonged to Donald Laycock's now-defunct 1973 Sepik–Ramu proposal. If related, they are not close. The connection is not accepted by Timothy Usher. Based on oral histories of the Lower Sepik peoples, which record that Yimas is spoken near their homeland, as well as the conservative nature of Yimas itself, Ross suggests that the speakers of Proto–Ramu – Lower Sepik may have lived in the northern foothills of the New Guinea highlands and moved into the Sepik Basin as the inland Sepik Sea started to recede six thousand years ago. Classification The Ramu-Lower Sepik family is not accepted by Søren Wichmann (2013), who splits it into 4-5 separate groups. Foley (2018) accepts that Ramu and Lower Sepik are related on the basis of morphological evidence, although they are typologically still very different from each other. It is also accepted by Glottolog. Grass languages are lexically divergent, sharing very few cognates with the other Ramu languages. Foley (2018: 205) leaves open the possibility of Grass being a third branch of the Lower Sepik-Ramu family, with Lower Sepik and Ramu being sister branches. Typology Although the Lower Sepik and Ramu groups are related, Ramu is morphologically much simpler than Lower Sepik due to differing historical contact scenarios. The Ndu, Yuat, and Ramu groups all have relatively simple morphology, while the Lower Sepik family has some of the most complex morphology seen among Papuan languages. Foley posits that morphological simplification among these disparate languages families had occurred due to creolization through widespread language contact. He notes that the most spread-out languages with wide geographical distributions are also the