Banggai language

The Banggai language is the main language spoken by the inhabitants of the Banggai Archipelago off the island of Sulawesi. It belongs to the Saluan–Banggai branch of the Celebic subgroup.
Historically, Banggai was a spoken language without a long literary history. The earliest surviving manuscript in the Banggai language comes from the 19th century, the account of a Banggai fisherman who was sold into slavery by Maguindanaoan raiders in the 1860s-70s before escaping.

Phonology

Consonants

/s/ may also be heard as prenasal when after nasal sounds.
Other sounds like are heard in loanwords from neighboring languages.
Vowels
Vowels /e, o/ can also be heard as in closed syllables.