Resisting European-American settlers encroaching on their territory, they were forced by the US to sell their country in 1832 and move to Indian Territory (Oklahoma) during the era of Indian Removal in the 1830s. Current status Emily Johnson Dickerson, the last monolingual speaker of Chickasaw, died on December 30, 2013. Ethnologue estimated in its seventeenth edition that Chickasaw retained up to 600 speakers, but noted that this figure was rapidly declining because most speakers are 50 and older. Children are no longer acquiring the language, indicating Chickasaw has a notably low vitality. As of 2014, there were "four to five confident conversational speakers who are under the age of 35." The Chickasaw language is not much used outside of the home. In terms of conservation and language vitality, Ethnologue evaluates the current language situation as moribund, and UNESCO lists Chickasaw as a "severely endangered" language, also noting that most of the ~50 speakers (as of 2019) are over fifty and almost all are bilingual in English. Language revitalization The Chickasaw Language Revitalization Program, founded in 2007, uses both Munro-Willmond and Humes alphabets. Because Chickasaw is a spoken language, "there is no 'right' or 'wrong' way to spell Chickasaw." Chickasaw is taught through a master-apprentice program, community programs, and self-study programs. A "Chickasaw Language Basic" app is available for iPhone, iPad, and other iOS devices. Classes and programs The Chickasaw Nation has a department of Chickasaw Language with a 24-member Chickasaw Language Committee. In 2007, the tribe founded the Chickasaw Language Revitalization Program. Four levels of Chickasaw language classes are taught at East Central University in Ada, Oklahoma. Joshua D. Hinson (called "Lokosh," meaning gourd, in the language), director of the Chickasaw Language Committee developed master-apprenticeship programs with guidance from linguist Leanne Hinton. Chipota Chikashshanompoli is a children's language program that meets monthly. Ada, Ardmore, Norman, Purcell, Sulphur, and Tishomingo all host non-academic adult language classes. The tribe also organizes immersion camps and publishes Chickasaw language literature through the Chickasaw Press. More recently, the Chickasaw Language Revitalization Program has been working with Rosetta Stone and Ackerman McQueen, releasing a video series teaching learners how to speak Chickasaw with the Rosetta Stone Advanced Languages software. Phonology Consonants Chickasaw has 16 consonants. In the table below, the consonants are written in the standard Chickasaw orthography. The phonetic symbolization of each consonant is written in the International Phonetic Alphabet (IPA) to the right of