Question: What are the three language divisions of the group of tribes the Santee Dakota people belong to?

Context articles: Sioux
Sisseton Wahpeton Oyate
Lake Traverse Indian Reservation
Flandreau Santee Sioux Tribe
Spirit Lake Tribe
Isanti, Minnesota
Seminole music
Flandreau Indian Reservation
Dakota (given name)
Inkpaduta

The Sioux also known as Dakota, are groups of Native American tribes and First Nations peoples in North America.
 The term can refer to any ethnic group within the Great Sioux Nation or to any of the nation's many language dialects.
 The Sioux comprise three major divisions based on language divisions: the Dakota, Lakota, and Nakota.
The Sisseton Wahpeton Oyate of the Lake Traverse Reservation, formerly Sisseton-Wahpeton Sioux Tribe/Dakota Nation, is a federally recognized tribe comprising two bands and two sub-divisions of the "Isanti" or Santee Dakota people.
 They are located on the Lake Traverse Reservation in northeast South Dakota.
The Lake Traverse Indian Reservation is the homeland of the Sisseton Wahpeton Oyate, a branch of the Santee Dakota group of Native Americans.
 The reservation is located in parts of five counties in extreme northeastern South Dakota and parts of two counties in southeastern North Dakota, United States.
 Over 60 percent of its land area lies in Roberts County, South Dakota, but there are lesser amounts in Marshall, Day, Grant, and Codington counties in South Dakota, as well as Sargent and Richland counties in North Dakota.
 Its resident population of 10,408 persons was counted during the 2000 census.
 About one-third of its inhabitants claim to be of solely Native American heritage.
 Its largest community is the city of Sisseton, South Dakota.
The Flandreau Santee Sioux Tribe are a federally recognized tribe of Santee Dakota people.
 Their reservation is the Flandreau Indian Reservation.
 The tribe are members of the Mdewakantonwan people, one of the sub-tribes of the Isanti (Santee) Dakota originally from central Minnesota.
The Spirit Lake Tribe (in Santee Dakota: "Mni Wakan Oyate", formerly known as Devils Lake Sioux) is a federally recognized tribe based on a reservation located in east-central North Dakota on the southern shores of Devils Lake.
 It is made up of people of the Pabakse ("Iháŋkthuŋwaŋna"), Sisseton ("Sisíthuŋwaŋ") and Wahpeton ("Waȟpéthuŋwaŋ") bands.
Isanti ( ) is a city in Isanti County, Minnesota, United States.
 The population was 5,251 at the 2010 census.
 The name "Isanti" is composed of two Dakota words: "isan" - 'knife' + "ati" - 'camp', and refers to the Santee Dakota people.
Seminole music is the music of the Seminole people, an indigenous people of the Americas who formed in Florida in the 18th century.
 Today most live in Oklahoma, but a minority continue in Florida.
 They have three federally recognized tribes, and some people belong to bands outside those groups.
 Their traditional music includes extensive use of rattles, hand drums, water drums, and flutes.
The Flandreau Indian Reservation is an Indian reservation, belonging to the federally recognized Flandreau Santee Sioux Tribe of South Dakota.
 They are Santee Dakota people, part of the Sioux tribe of Native Americans.
 The reservation is located in Flandreau Township in central Moody County in eastern South Dakota, near the city of Flandreau.
Dakota is a given name derived from the name of an indigenous Native American tribe: Dakota people or from the name of two states in the United States: North Dakota and South Dakota which are also derived from the Dakota people local to that area.
 The name is translated to mean "friend", "friendly" or "allies" in the Yankton-Yanktonai and Santee dialects of the Lakota Sioux language.
Inkpaduta (Dakota: Iŋkpáduta, variously translated as "Red End," "Red Cap," or "Scarlet Point") (about 1797–1881) was a war chief of the Wahpekute band of the Dakota (Eastern or Santee Dakota) during the 1857 Spirit Lake Massacre and later Western Sioux actions against the United States Army in the Dakota Territory, Wyoming and Montana.