English safety training did not transfer: models that refused 69% of English attacks rejected as few as 0% in Yoruba
AspireAI community · arXiv (Yoruba/Nigerian Pidgin safety study)
A red-teaming study of six frontier LLMs with 400 explicit adversarial prompts in Yoruba and Nigerian Pidgin, scored by native-speaker annotators, found that models refusing up to 69% of English prompts refused as few as 0% in Yoruba, and that the authors attribute to weak comprehension rather than to safety; when the models did engage, harmful content rates reached 0.63 in English and 0.50 in Nigerian Pidgin. GPT-4o Mini showed the largest cross-lingual gap at +0.23 in Yoruba, cultural stereotypes and discrimination was the hardest category to detect at 0.44 attack success rate, and Aya 101 had the highest English attack success rate at 0.60. The study covers two languages and six models, so it establishes a gap rather than measuring how wide it is across African languages generally.
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