Rotokas has only 11 phonemes, the fewest of any known language

Rotokas is a small language spoken by a few thousand people on Bougainville Island in Papua New Guinea. Its sound inventory is famously tiny: just 11 phonemes, made up of 6 consonants and 5 vowels. That is about a third the size of English's inventory, and it is often described as the smallest of any known language. ^[1][2]

The consonants are usually analyzed as p, t, k, b, d, g, and the vowels as a, e, i, o, u. Some researchers have debated whether the voiced and voiceless stops are truly distinct phonemes or whether they are allophones, but the standard count remains 11. ^[1][3]

How so few sounds work

Rotokas keeps its sound inventory manageable by restricting how sounds can combine. Consonant clusters are rare, and syllables are mostly simple patterns like vowel, consonant-vowel, or vowel-consonant. This means speakers rarely need to produce complex sequences of consonants, so the small set of phonemes is enough for all the words the language needs. ^[1][2]

A contrast with other languages

Rotokas is often compared with !Xóõ, a Khoisan language of southern Africa that has well over 100 phonemes, including many click sounds. The gap between the two shows how much languages can vary in their sound systems while still serving their communities perfectly well. ^[3][4]

• Rotokas has no phonemic tone and no nasal vowels. ^[1]
• Its vowel system is a simple five-vowel triangle: a, e, i, o, u. ^[2]
• The language is not related to the better-known Tok Pisin or English spoken in Papua New Guinea. ^[1][4]

Rotokas is not the only language with a small inventory. Some analyses of Central Rotokas and the closely related Aita Rotokas have suggested even smaller consonant counts, but the widely cited figure for Rotokas as a whole remains 11 phonemes. The language is written with a Latin-based alphabet today, and it continues to be used in daily life on Bougainville. ^[1][3]