Only in Daur 36
What this means for learners
Daur and Chuvash share 21 sounds — roughly 37% of Chuvash's inventory overlaps with Daur. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 18 sounds found only in Chuvash represent the greatest pronunciation challenge for Daur 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, Daur has 36 sounds not used in Chuvash. Native Chuvash speakers learning Daur 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.