What this means for learners
Kunama and Luganda share 21 sounds — roughly 62% of Luganda's inventory overlaps with Kunama. Shared sounds are ones a speaker already knows from their native language and will generally produce and perceive accurately without explicit training.
The 12 sounds found only in Luganda represent the greatest pronunciation challenge for Kunama 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, Kunama has 13 sounds not used in Luganda. Native Luganda speakers learning Kunama 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.