Jackson Trager
2025
MFTCXplain: A Multilingual Benchmark Dataset for Evaluating the Moral Reasoning of LLMs through Multi-hop Hate Speech Explanation
Jackson Trager
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Francielle Vargas
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Diego Alves
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Matteo Guida
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Mikel K. Ngueajio
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Ameeta Agrawal
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Yalda Daryani
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Farzan Karimi Malekabadi
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Flor Miriam Plaza-del-Arco
Findings of the Association for Computational Linguistics: EMNLP 2025
Ensuring the moral reasoning capabilities of Large Language Models (LLMs) is a growing concern as these systems are used in socially sensitive tasks. Nevertheless, current evaluation benchmarks present two major shortcomings: a lack of annotations that justify moral classifications, which limits transparency and interpretability; and a predominant focus on English, which constrains the assessment of moral reasoning across diverse cultural settings. In this paper, we introduce MFTCXplain, a multilingual benchmark dataset for evaluating the moral reasoning of LLMs via multi-hop hate speech explanations using the Moral Foundations Theory. MFTCXplain comprises 3,000 tweets across Portuguese, Italian, Persian, and English, annotated with binary hate speech labels, moral categories, and text span-level rationales. Our results show a misalignment between LLM outputs and human annotations in moral reasoning tasks. While LLMs perform well in hate speech detection (F1 up to 0.836), their ability to predict moral sentiments is notably weak (F1 < 0.35). Furthermore, rationale alignment remains limited mainly in underrepresented languages. Our findings show the limited capacity of current LLMs to internalize and reflect human moral reasoning.
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- Ameeta Agrawal 1
- Diego Alves 1
- Yalda Daryani 1
- Matteo Guida 1
- Farzan Karimi Malekabadi 1
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