What's the Siouan language?
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The Western Siouan languages, also called Siouan proper or simply Siouan, are a large language family native to North America. They are closely related to the Catawban languages, sometimes called Eastern Siouan, and together with them constitute the Siouan (Siouan–Catawban) language family.
Western Siouan languages
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In the 19th century, Robert Latham suggested that the Siouan languages are related to the Caddoan and Iroquoian languages. In 1931, Louis Allen presented the first list of systematic correspondences between a set of 25 lexical items in Siouan and Iroquoian. In the 1960s and 1970s, Wallace Chafe further explored the link between Siouan and Caddoan languages. In the 1990s, Marianne Mithun compared the morphology and syntax of all the three families. At present, the Macro-Siouan hypothesis based on relations among Siouan, Caddoan, and Iroquoian is not universally accepted as proven.
Macro-Siouan languages
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In the 19th century, Robert Latham suggested that the Siouan languages are related to the Caddoan and Iroquoian languages. In 1931, Louis Allen presented the first list of systematic correspondences between a set of 25 lexical items in Siouan and Iroquoian. In the 1960s and 1970s, Wallace Chafe further explored the link between Siouan and Caddoan languages. In the 1990s, Marianne Mithun compared the morphology and syntax of all the three families. At present, this Macro-Siouan hypothesis is not considered proved, and the similarities between the three families may instead be due to their protolanguages having been part of a sprachbund.
Siouan languages
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Siouan or Siouan–Catawban is a language family of North America that is located primarily in the Great Plains, Ohio and Mississippi valleys and southeastern North America with a few other languages in the east.
Siouan languages
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Authors who call the entire family "Siouan" distinguish the two branches as "Western Siouan" and "Eastern Siouan" or as "Siouan-proper" and "Catawban". Others restrict the name "Siouan" to the western branch and use the name "Siouan–Catawban" for the entire family. Generally, however, the name "Siouan" is used without distinction.
Siouan languages
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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.
Siouan languages
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Linguistic and historical records indicate a possible southern origin of the Siouan people, with migrations over a thousand years ago from North Carolina and Virginia to Ohio. Some continued down the Ohio River to the Mississippi and up to the Missouri. Others went down the Mississippi, settling in what is now Alabama, Mississippi and Louisiana. Others traveled across Ohio to what is now Illinois, Wisconsin, and Minnesota, home of the Dakota.
Western Siouan languages
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Linguistic and historical records indicate a possible southern origin of Siouan peoples, with migrations over a thousand years ago from North Carolina and Virginia to Ohio. Some peoples continued down the Ohio River to the Mississippi River and up the Missouri River, and others across Ohio to Illinois, Wisconsin and Minnesota, home of the Dakota. Ohio Valley Siouan (Southeastern Siouan) is a group of related Siouan languages, which included the Ofo language, Biloxi language, and the Tutelo language. The Tutelo language was a group of mutually intelligible dialects spoken by the Tutelo, Monacan, Manahoac and Nahyssan confederacies, and Occaneechi in what is now Virginia and West Virginia.
Protohistory of West Virginia
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There is a certain amount of comparative work in Siouan–Catawban languages. Wolff (1950–51) is among the first and more complete works on the subject. Wolff reconstructed the system of proto-Siouan, and this was modified by Matthews (1958). The latter's system is shown below:
Siouan languages
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Collaborative work involving a number of Siouanists started at the 1984 Comparative Siouan Workshop at the University of Colorado with the goal of creating a comparative Siouan dictionary that would include Proto-Siouan reconstructions. This work yielded a different analysis of the phonemic system of Proto-Siouan, which appears below:
Siouan languages
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Unlike Wolff and Matthew's proposals, there are no posited nasal consonants in Proto-Siouan. Nasal consonants only arise in daughter languages when followed by a nasal vowel. 
In addition, there is a set of sounds that represent obstruentized versions of their corresponding sonorants. These sounds have different reflexes in daughter languages, with *w appearing as [w] or [m] in most daughter languages, while *W has a reflex of [w], [b], [mb], or [p]. The actual phonetic value of these obstruents is an issue of some debate, with some arguing that they arise through geminated *w+*w or *r+*r sequences or a laryngeal plus *w or *r.
Siouan languages