When Words Don’t Mean What They Say: Figurative Understanding in Bengali Idioms

Adib Sakhawat, Shamim Ara Parveen, Md Ruhul Amin, Tahera Khatun, Shamim Al Mahmud, Md Saiful Islam


Abstract
Figurative language understanding remains a significant challenge for Large Language Models (LLMs), especially for low-resource languages. To address this, we introduce the Bangla Bagdhara dataset, a large-scale, culturally grounded corpus of 10,361 Bengali idioms. Each idiom is annotated under a comprehensive 19-field schema, established and refined through a deliberative expert consensus process that captures its semantic, syntactic, cultural, and religious dimensions, providing a rich and structured resource for computational linguistics. To establish a robust benchmark for Bangla figurative language understanding, we evaluate 30 state-of-the-art multilingual and instruction-tuned LLMs on the task of inferring figurative meaning. Our results reveal a critical performance gap, with no model surpassing 50% accuracy, in stark contrast to significantly higher human performance (83.4%). This finding underscores the limitations of existing models in cross-linguistic and cultural reasoning. By releasing the Bangla Bagdhara dataset and benchmark, we provide foundational infrastructure for advancing figurative language understanding and cultural grounding in LLMs for Bengali and other low-resource languages.
Anthology ID:
2026.lrec-1.546
Volume:
Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:
May
Year:
2026
Address:
Palma de Mallorca, Spain
Editors:
Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:
LREC
SIG:
Publisher:
ELRA Language Resource Association
Note:
Pages:
6870–6879
Language:
External URL:
https://lrec.elra.info/lrec2026-main-546
DOI:
10.63317/546w2cys6m6t
Bibkey:
Cite (ACL):
Adib Sakhawat, Shamim Ara Parveen, Md Ruhul Amin, Tahera Khatun, Shamim Al Mahmud, and Md Saiful Islam. 2026. When Words Don’t Mean What They Say: Figurative Understanding in Bengali Idioms. In Proceedings of the Fifteenth Language Resources and Evaluation Conference, pages 6870–6879, Palma de Mallorca, Spain. ELRA Language Resource Association.
Cite (Informal):
When Words Don’t Mean What They Say: Figurative Understanding in Bengali Idioms (Sakhawat et al., LREC 2026)
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