Winnebago, or Ho-Chunk, is a Siouan language spoken in parts of Wisconsin, Nebraska, Iowa, South Dakota, Illinois and Minnesota in the USA. According to the 2000 census there are 1,650 Ho-chunk people, and there are thought to be 100 speakers of Ho-chunk. The language is also known as Hocak Wazijaci, Hochank or Hochunk.
The Ho-Chunk speakers call themselves Hotcągara. Speakers of this language in Nebraska call themselves Winnebago and are recognised as a separate tribe. The name Winnebago comes from the Sauk and Fox word Oinepegi and means something like "filthy/fetid water" [source].
The Ho-Chunk, or Winnebago, alphabet was adapted from the Fox syllabary, which was invented in the 1870s. The first row of Latin letters are those used by the Hocąk Wazijaci Haci Language and Culture Program, those in the second row are used by Paul Radin.
This alphabet was adopted as the official writing system of the Ho-Chunk Nation in July 1994.
The Encyclopedia of Hotcąk Mythology - information about the Hotcąk people and language: http://hotcakencyclopedia.com
Hocak Worak - Newsletter of the Ho-Chunk Nation (in English)
Hotchank hit'é - The Winnebago language
Winnebago Tribe of Nebraska