The North Sarawakan languages consist of several groups Austronesian languages

Austronesian languages

The Austronesian languages are a language family widely dispersed throughout the islands of Southeast Asia and the Pacific, with a few members spoken on continental Asia that are spoken by about 386 million people. It is on par with Indo-European, Niger-Congo, Afroasiatic and Uralic as one of the...

 spoken in the northeastern part of the province of Sarawak

Sarawak

Sarawak is one of two Malaysian states on the island of Borneo. Known as Bumi Kenyalang , Sarawak is situated on the north-west of the island. It is the largest state in Malaysia followed by Sabah, the second largest state located to the North- East.The administrative capital is Kuching, which...

, Borneo

Borneo

Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

.

A 2008 analysis of the Austronesian Basic Vocabulary Database found full support for the unity of the North Sarawakan languages. Blust (1991), cited in Adelaar & Himmelmann (2005), had specifically excluded the Kayan (Kayan-Murik) languages, though including the neighboring Kenyah languages

Kenyah languages

The Kenyah languages are a group of half a dozen or so closely related languages spoken by the Kenyah peoples of Borneo. They are:...

. However, the 2008 study found Kenyah to fall within Kayan-Murik, and that all were North Sarawakan:

North Sarawakan languages

• Kayan–Murik (incl. Kenyah
  Kenyah languages
  The Kenyah languages are a group of half a dozen or so closely related languages spoken by the Kenyah peoples of Borneo. They are:...
  
  )
• Melanau–Bintulu
• Berawan–Kelabitic (90% support)
  • Kelabitic
    Kelabitic languages
    The Apo Duat or Kelabitic languages are a group of closely related languages spoken by the Kelabit, Lun Bawang, and related peoples. They are:...
    
    
  • Berawan – Lower Baram

In addition, the Punan–Nibong languages, not addressed by Adelaar & Himmelmann or the 2008 study, are suggested by Ethnologue

Ethnologue

Ethnologue: Languages of the World is a web and print publication of SIL International , a Christian linguistic service organization, which studies lesser-known languages, to provide the speakers with Bibles in their native language and support their efforts in language development.The Ethnologue...

15 to be closest to Kenyah.