Basap is an Austronesian language spoken in

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...

, Indonesia. Within

Kalimantan Timur East Kalimantan ( Indonesian: ) is a province of Indonesia. Its territory comprises the eastern portion of Borneo. It had a population of about 3.03 million at the 2010 census (within the current boundary), 3.42 million at the 2015 census, and 3 ...

and

Kalimantan Utara North Kalimantan ( id, Kalimantan Utara) is a province of Indonesia. It is located on the northernmost of Kalimantan, the Indonesian part of the island of Borneo. North Kalimantan borders the Malaysian states of Sabah to the north and Sarawak t ...

provinces, Basap speakers are scattered across Berau, Bulungan, Kutai Kartanegara, Penajam Paser Utara, and Kutai Timur regencies. Dialects are Jembayan, Bulungan, Berau, Dumaring, Binatang, and Karangan (''Ethnologue''). Smith (2018)Smith, Alexander D. 2018
The Barito Linkage Hypothesis, with a Note on the Position of Basap
JSEALS Volume 11.1 (2018). considers Basap to have formed part of an ancient linkage of early forms of

Barito languages The Barito languages are around twenty Austronesian languages of Indonesia (Borneo), Southern Philippines, plus Malagasy, the national language of Madagascar. They are named after the Barito River located in South Kalimantan, Indonesia. The ...

in eastern Kalimantan.

References

Basap–Barito languages Languages of Indonesia {{au-lang-stub