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Fact · Languages and accents

7.8times

On the Fleurs benchmark, Whisper large-v2's word error rate for Persian was about 7.8 times its rate for English.

Checked against its source on October 17, 2026

What it measures: Calculated from two Whisper large-v2 word error rates on the same Fleurs test set, for Persian and for English. The result is a ratio of the two rates, not a difference in percentage points.
How it is calculated: 32.9 / 4.2 = 7.8

Calculated from

On the Fleurs benchmark, the Whisper large-v2 model had a word error rate of 32.9 percent for Persian.
On the Fleurs benchmark, the Whisper large-v2 model had a word error rate of 4.2 percent for English.

Cited on

Arabic Speech to Text and Right-to-Left DictationGuide

Persian error rate is 7.8 times English on Fleurs | Yap