TamilVoiceLab@DravidianLangTech 2026: Investigating Whisper Tamil Large-v2 for Dialectal Tamil Speech Recognition

S.b.priya, Bharathi B


Abstract
Automatic Speech Recognition (ASR) for languages rich in dialects and those with limited resources presents significant challenges due to the variations in pronunciation and vocabulary across different regions. This study offers a baseline evaluation of the Whisper Tamil Large-v2 model without fine-tuning for the Tamil Dialect Speech Recognition shared task. The focus is on the ASR subtask, utilizing dialectal Tamil speech recordings gathered from various regional dialects within Tamil Nadu. The pretrained Whisper Tamil Large-v2 model was assessed directly, without any supplementary fine-tuning or domain adaptation. A total of 579 dialect speech samples were used for experimentation, with performance evaluated based on Word Error Rate (WER). The model recorded a WER of 0.71, indicating that even robust multilingual pretrained models encounter challenges in dialect-rich and low-resource environments. These findings underscore the necessity for dialect-aware adaptation and the importance of balanced dialect training data to develop effective Tamil ASR systems.
Anthology ID:
2026.dravidianlangtech-1.63
Volume:
Proceedings of the Sixth Workshop on Speech, Vision, and Language Technologies for Dravidian Languages
Month:
July
Year:
2026
Address:
Underline (Virtual)
Editors:
Bharathi Raja Chakravarthi, Ruba Priyadharshini, Anand Kumar Madasamy, Sajeetha Thavareesan, Saranya Rajiakodi, Subalalitha Navaneethakrishnan, Dhivya Chinnappa, Balasubramanian Palani, Malliga Subramanian, Kogilavani Shanmugavadivel, Ratnavel Rajalakshmi
Venues:
DravidianLangTech | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
397–402
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.dravidianlangtech-1.63/
DOI:
Bibkey:
Cite (ACL):
S.b.priya and Bharathi B. 2026. TamilVoiceLab@DravidianLangTech 2026: Investigating Whisper Tamil Large-v2 for Dialectal Tamil Speech Recognition. In Proceedings of the Sixth Workshop on Speech, Vision, and Language Technologies for Dravidian Languages, pages 397–402, Underline (Virtual). Association for Computational Linguistics.
Cite (Informal):
TamilVoiceLab@DravidianLangTech 2026: Investigating Whisper Tamil Large-v2 for Dialectal Tamil Speech Recognition (S.b.priya & B, DravidianLangTech 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.dravidianlangtech-1.63.pdf