Exploring the Power of Large Language Models for Vietnamese Implitcit Sentiment Analysis

Huy Gia Luu, Dang Van Thin


Abstract
We present the first benchmark for implicit sentiment analysis (ISA) in Vietnamese, aimed at evaluating large language models (LLMs) on their ability to interpret implicit sentiment accompanied by ViISA, a dataset specifically constructed for this task. We assess a variety of open-source and close-source LLMs using state-of-the-art (SOTA) prompting techniques. While LLMs achieve strong recall, they often misclassify implicit cues such as sarcasm and exaggeration, resulting in low precision. Through detailed error analysis, we highlight key challenges and suggest improvements to Chain-of-Thought prompting via more contextually aligned demonstrations.
Anthology ID:
2025.inlg-main.14
Volume:
Proceedings of the 18th International Natural Language Generation Conference
Month:
October
Year:
2025
Address:
Hanoi, Vietnam
Editors:
Lucie Flek, Shashi Narayan, Lê Hồng Phương, Jiahuan Pei
Venue:
INLG
SIG:
SIGGEN
Publisher:
Association for Computational Linguistics
Note:
Pages:
202–214
Language:
URL:
https://preview.aclanthology.org/author-page-lei-gao-usc/2025.inlg-main.14/
DOI:
Bibkey:
Cite (ACL):
Huy Gia Luu and Dang Van Thin. 2025. Exploring the Power of Large Language Models for Vietnamese Implitcit Sentiment Analysis. In Proceedings of the 18th International Natural Language Generation Conference, pages 202–214, Hanoi, Vietnam. Association for Computational Linguistics.
Cite (Informal):
Exploring the Power of Large Language Models for Vietnamese Implitcit Sentiment Analysis (Luu & Thin, INLG 2025)
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PDF:
https://preview.aclanthology.org/author-page-lei-gao-usc/2025.inlg-main.14.pdf