The Illinois language is a member of the Algonquian language family, historically spoken by the Illinois people, a Native American tribe in the central United States. This language was primarily used in the regions that are now Illinois, Indiana, and Missouri. Today, the Illinois language is considered extinct, with no fluent speakers remaining. However, efforts are being made to revitalize the language through documentation and educational programs, aiming to preserve its cultural heritage and linguistic features for future generations.