 Traditionally, peoples of both tribes have spoken the Omaha-Ponca language, part of the Siouan language family.Under the Department of Interior's Land Buy-Back Program for Tribal Nations, more than 1300 holders of fractional interests at this tribe were offered a total of $7 million to purchase holdings for transfer to the tribe, to increase their communal lands.The Ponca Tribe of Indians of Oklahoma is headquartered in Ponca City, Oklahoma.