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Raphael Wadimbutulu Mansilua

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Open access Jul 2026

Diphthong Pronunciation Errors among Final-Year Congolese EFL Learners: A Comparative Study of Public and Private Secondary Schools in Boma, DRC

Pronunciation, and diphthongs in particular, remains a persistent obstacle to oral proficiency for English as a Foreign Language (EFL) learners whose first languages lack equivalent vowel glides, yet Congolese EFL contexts remain largely absent from the empirical literature on this problem. This study investigated Engl...

Raphael Wadimbutulu Mansilua · 0 citations

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