ParsBench: A Benchmark for Evaluating Fine-Grained Culturally Grounded Commonsense Reasoning in Persian

Mehrnoush Alizade, Farbod Davoodi, Suman Kalyan Maity


Abstract
Large Language Models (LLMs) have achieved remarkable progress in natural language understanding and generation, yet their evaluation remains heavily centered on English and Western cultural contexts, limiting their reliability in culturally diverse and low-resource settings. We introduce ParsBench, a comprehensive benchmark for evaluating fine-grained culturally grounded commonsense reasoning in Persian. ParsBench consists of three complementary components: Expert-QA, Multimodal-QA, and Long-Form QA, collectively covering structured reasoning, multimodal cultural understanding, and open-ended generation across diverse cultural categories. We evaluate a broad range of multilingual and multimodal LLMs and observe substantial variation across models and cultural categories. Our results reveal persistent weaknesses in culturally grounded non-English reasoning and significant disparities between textual and multimodal understanding. Overall, the findings demonstrate that existing English-centric evaluations fail to capture important dimensions of cultural competence and highlight the need for culturally grounded benchmarks for more inclusive evaluation. Our code and dataset are available at https://github.com/ParsBench-CCS/ParsBench
Anthology ID:
2026.emnlp-main.2635
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
59892–59913
Language:
URL:
https://aclanthology.org/2026.emnlp-main.2635/
DOI:
Bibkey:
Cite (ACL):
Mehrnoush Alizade, Farbod Davoodi, and Suman Kalyan Maity. 2026. ParsBench: A Benchmark for Evaluating Fine-Grained Culturally Grounded Commonsense Reasoning in Persian. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 59892–59913, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
ParsBench: A Benchmark for Evaluating Fine-Grained Culturally Grounded Commonsense Reasoning in Persian (Alizade et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.2635.pdf