Ampanang language
Ampanang is an Austronesian language spoken at the village of Ampanang, at the Kahala river, East Kalimantan. It is closely related to Tunjung, forming the Mahakam languages. This language has extremely little documentation, and is only known from a 19-word vocabulary list on S. C. Knappert's work Beschrijving van de Onderafdeeling Koetei. Ampanang had been already displaced by or mixed with Kutainese or Malay among the younger generation.
Christian missionary websites claim that Ampanang people live in Jambuk and Lemper, therefore conflicting with the information provided by S. C. Knappert.