Matina: A Culturally-Aligned Persian Language Model Using Multiple LoRA Experts

Sara Bourbour Hosseinbeigi, MohammadAli SeifKashani, Javad Seraj, Fatemeh Taherinezhad, Ali Nafisi, Fatemeh Nadi, Iman Barati, Hosein Hasani, Mostafa Amiri, Mostafa Masoudi


Abstract
Large language models (LLMs) are powerful tools for a variety of applications, but to interact effectively with users, they must align with the cultural values and linguistic nuances of their audience. However, existing LLMs often fall short in adequately modeling underrepresented languages and cultures, such as Persian, limiting their applicability and acceptance. To address this, we construct diverse, high-quality datasets specifically tailored to Persian linguistic and cultural contexts, ensuring a more authentic and context-aware training process. Using these datasets, we develop Matina, a Persian-focused multi-expert model designed to embody Iranian cultural values and linguistic structures. Matina is trained by fine-tuning LLaMA3.1 8B-Instruct models across five domains: culinary, tourism, socio-culture, translation, and summarization. These experts are combined using a classifier to create a unified multi-expert system. By leveraging culturally aligned datasets, Matina outperforms baseline models in both task performance and user satisfaction, demonstrating the importance of data-driven cultural adaptation in LLM development.
Anthology ID:
2025.findings-acl.1074
Volume:
Findings of the Association for Computational Linguistics: ACL 2025
Month:
July
Year:
2025
Address:
Vienna, Austria
Editors:
Wanxiang Che, Joyce Nabende, Ekaterina Shutova, Mohammad Taher Pilehvar
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
20874–20889
Language:
URL:
https://preview.aclanthology.org/mtsummit-25-ingestion/2025.findings-acl.1074/
DOI:
10.18653/v1/2025.findings-acl.1074
Bibkey:
Cite (ACL):
Sara Bourbour Hosseinbeigi, MohammadAli SeifKashani, Javad Seraj, Fatemeh Taherinezhad, Ali Nafisi, Fatemeh Nadi, Iman Barati, Hosein Hasani, Mostafa Amiri, and Mostafa Masoudi. 2025. Matina: A Culturally-Aligned Persian Language Model Using Multiple LoRA Experts. In Findings of the Association for Computational Linguistics: ACL 2025, pages 20874–20889, Vienna, Austria. Association for Computational Linguistics.
Cite (Informal):
Matina: A Culturally-Aligned Persian Language Model Using Multiple LoRA Experts (Hosseinbeigi et al., Findings 2025)
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PDF:
https://preview.aclanthology.org/mtsummit-25-ingestion/2025.findings-acl.1074.pdf