What this means for learners
JAPRERIA and Cebuano share 11 sounds — roughly 46% of Cebuano's inventory overlaps with JAPRERIA. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 10 sounds found only in Cebuano represent the greatest pronunciation challenge for JAPRERIA 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, JAPRERIA has 13 sounds not used in Cebuano. Native Cebuano speakers learning JAPRERIA 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.