Fact · Languages and accents
1.4BLEU points
On the Fleurs read-speech test, Whisper large-v2 scored 1.4 BLEU when translating Yoruba speech into English.
Checked against its source on October 17, 2026
In the source's own words
“Whisper large-v2 35.3 7.2 9.2 12.5 14.5 16.1 26.6 29.4 17.2 6.0 20.4 1.4”
Robust Speech Recognition via Large-Scale Weak Supervision (full text), Alec Radford et al., OpenAI (arXiv), 2022, Table 14, BLEU scores on Fleurs (speech translation).
Open the original (DOI 10.48550/arXiv.2212.04356)- What it measures
- The Yoruba value is the last column of the Whisper large-v2 row in the block of languages that starts with Swedish.
- What it does not show
- Read sentences with one reference translation. The same paper reports far higher transcription errors for Yoruba than for any of the other languages in this set, so the English output needs a native speaker's check before anyone relies on it.