Answer based on context:

English language is the official language in the state of Montana, as it is in many U.S. states. According to the 2000 United States Census, 94.8 percent of the population aged 5 and older speak English at home. Spanish is the language most commonly spoken at home other than English. There were about 13,040 Spanish-language speakers in the state (1.4 percent of the population) in 2011. There were also 15,438 (1.7 percent of the state population) speakers of Indo-European languages other than English or Spanish, 10,154 (1.1 percent) speakers of a Native American language, and 4,052 (0.4 percent) speakers of an Asian or Pacific Islander language. Other languages spoken in Montana (as of 2013) include Assiniboine (about 150 speakers in the Montana and Canada), Blackfoot (about 100 speakers), Cheyenne (about 1,700 speakers), Plains Cree (about 100 speakers), Crow (about 3,000 speakers), Dakota (about 18,800 speakers in Minnesota, Montana, Nebraska, North Dakota, and South Dakota), German Hutterite (about 5,600 speakers), Gros Ventre (about 10 speakers), Kalispel-Pend dOreille (about 64 speakers), Kutenai (about 6 speakers), and Lakota (about 6,000 speakers in Minnesota, Montana, Nebraska, North Dakota, South Dakota). The United States Department of Education estimated in 2009 that 5,274 students in Montana spoke a language at home other than English. These included a Native American language (64 percent), German (4 percent), Spanish (3 percent), Russian (1 percent), and Chinese (less than 0.5 percent).

What all Native Americans tribes have over 1000-2000 speakers?
Cheyenne