What is the main language spoken in Borneo?

There is no single main language spoken in Borneo. Borneo is an island shared by three countries: Indonesia, Malaysia, and Brunei. Each of these countries has its own official language:

* Indonesia: Bahasa Indonesia

* Malaysia: Bahasa Melayu (Malay)

* Brunei: Bahasa Melayu (Malay)

However, within these countries, there are many different indigenous languages spoken in Borneo. Some of the major language families include:

* Austronesian languages: This family includes languages like Iban, Dayak, and Kadazan Dusun, spoken in Sarawak, Sabah, and Kalimantan.

* Malayo-Polynesian languages: This family includes Bahasa Melayu (Malay) and various other languages spoken in Brunei, Sabah, and Sarawak.

* Philippine languages: These languages, such as Tausug and Cebuano, are primarily spoken in the northern part of Borneo, in the Sabah region of Malaysia.

Therefore, it's more accurate to say that Borneo is a melting pot of languages, with many different languages spoken throughout the island.