What this means for learners
Island Carib and Yao share 17 sounds — roughly 35% of Yao's inventory overlaps with Island Carib. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 32 sounds found only in Yao represent the greatest pronunciation challenge for Island Carib speakers. The adult brain tends to map unfamiliar sounds onto the closest native equivalent — a process that produces the characteristic "accent" of a second-language speaker. Learning to hear and produce these sounds as distinct requires focused ear training, not just repetition.
Conversely, Island Carib has 12 sounds not used in Yao. Native Yao speakers learning Island Carib will face the mirror-image challenge with these sounds.
Phoneme inventories from PHOIBLE. Data reflects one documented inventory per language; some variation exists across dialects and sources.