What this means for learners
Guahibo and Moore share 27 sounds — roughly 63% of Moore's inventory overlaps with Guahibo. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 16 sounds found only in Moore represent the greatest pronunciation challenge for Guahibo 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, Guahibo has 8 sounds not used in Moore. Native Moore speakers learning Guahibo 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.