Papers by Salomey Osei

10 papers
AfriHate: A Multilingual Collection of Hate Speech and Abusive Language Datasets for African Languages (2025.naacl-long)

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Challenge: Hate speech and abusive language are global phenomena that need sociocultural background knowledge to be understood, identified, and moderated.
Approach: They propose to use a multilingual dataset to collect hate speech and abusive language in 15 African languages to help improve model performance.
Outcome: The proposed datasets are based on tweets annotated by native speakers familiar with the regional culture and show that they perform well in low-resource settings.
MasakhaNER: Named Entity Recognition for African Languages (2021.tacl-1)

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Challenge: (2020) African languages are underrepresented in existing natural language processing datasets, research, and tools due to lack of datasets and reproducible results.
Approach: They propose to create a dataset for named entity recognition (NER) in ten African languages.
Outcome: The results of the first large dataset for named entity recognition (NER) in ten African languages are released to inform future research on African NLP.
AfriSenti: A Twitter Sentiment Analysis Benchmark for African Languages (2023.emnlp-main)

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Challenge: Africa has the highest linguistic diversity among all continents.
Approach: They introduce a sentiment analysis benchmark that contains >110,000 tweets in 14 African languages . they describe the data collection methodology, annotation process, and challenges .
Outcome: The proposed dataset contains >110,000 tweets in 14 African languages . the tweets were annotated by native speakers and used in the shared task .
AfriMTE and AfriCOMET: Enhancing COMET to Embrace Under-resourced African Languages (2024.naacl-long)

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Challenge: Recent advances in machine translation (MT) have focused on scaling multilingual machine translation models and evaluation data to hundreds of languages, including multiple under-resourced languages.
Approach: They propose to use n-gram matching metrics to measure progress in multilingual machine translation to 13 typologically diverse African languages to create high-quality human evaluation data with simplified MQM guidelines.
Outcome: The proposed metrics have a higher correlation with human judgments than n-gram matching metrics such as BLEU and METEOR.
GEMv2: Multilingual NLG Benchmarking in a Single Line of Code (2022.emnlp-demos)

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Challenge: Evaluations in machine learning rarely use the latest metrics, datasets, or human evaluation in favor of remaining compatible with prior work.
Approach: They propose to use the Generation, Evaluation, and Metrics Benchmark to integrate new evaluation methods into existing evaluations.
Outcome: The proposed evaluation infrastructure bridges the gap between the advantages of leaderboards and in-depth and evolving evaluations by allowing model developers to benefit from each other's work.
IrokoBench: A New Benchmark for African Languages in the Age of Large Language Models (2025.naacl-long)

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Challenge: Large language models (LLMs) are limited to a few high-resource languages . many low-resourced languages are evaluated only on basic text classification tasks .
Approach: They propose to use IrokoBench to evaluate 17 low-resource African languages . they use human-translated benchmark datasets to evaluate zero-shot, few-shot and translate-test settings .
Outcome: The proposed model performs well in English and French, but the highest performing model perform poorly in proprietary models.
INJONGO: A Multicultural Intent Detection and Slot-filling Dataset for 16 African Languages (2025.acl-long)

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Challenge: Slot-filling and intent detection tasks are well-established tasks in Conversational AI, but current benchmarks for these tasks rely on evaluations of low-resource languages and translations from English benchmarks.
Approach: They propose to use a multilingual, open-source benchmark dataset for 16 African languages with utterances generated by native speakers across diverse domains.
Outcome: The proposed dataset compares multilingual transformer models and prompting large language models (LLMs) with the English language.

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