What this means for learners
KOHUMONO and Lahu share 22 sounds — roughly 48% of Lahu's inventory overlaps with KOHUMONO. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 24 sounds found only in Lahu represent the greatest pronunciation challenge for KOHUMONO 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, KOHUMONO has 16 sounds not used in Lahu. Native Lahu speakers learning KOHUMONO 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.