Siouan languages
Siouan languages can be grouped into the Western Siouan languages and Catawban languages. The Western Siouan languages can be divided into Missouri River languages (such as Crow and Hidatsa), Mandan, Mississippi River languages (such as Dakotan, Chiwere-Winnebago, and Dhegihan languages), and Ohio Valley Siouan branches. The Catawban languages consist only of Catawban and Woccon.
Surigaonon language
Surigaonon is a Visayan language. It has been heavily influenced by Cebuano due to the influx of many Cebuanos in the region. However, most Cebuano speakers can hardly understand Surigaonon speakers, except for Cebuanos who has been living in the region for years.