arXiv AI By Zainab Afolabi, Nikita Kozodoi, Jack Butler, Babs Khalidson

NaijaFacts: A Framework for Disentangling Language from Knowledge in Facts about Nigeria

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NaijaFacts is a multilingual benchmark that tests language models on factual and statistical questions about Nigeria, presented in English, Nigerian Pidgin, Yoruba, Igbo, and Hausa. The study shows that models perform much better on UK and US facts (49–50% accuracy) than on Nigerian facts (20% accuracy), indicating a strong knowledge gap. Language effects are smaller, with performance dropping from English to Yoruba, but overall scale does not improve accuracy on Nigerian statistics.

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