gTTS × Ghanaian Languages — Voice Benchmark

Which free Google Text-to-Speech voice reads Ghanaian languages best? Every gTTS voice reads 200 sentences per language via africa-g2p universal graphemes, judged by ASR CER (lower is better).
updated
Voice leaderboard
Per language
Matrix
Voice detail
Cells show CER. Click a row to swap it into the voice-detail tab.