Prompt Balance Matters: Understanding How Imbalanced Few-Shot Learning Affects Multilingual Sense Disambiguation in LLMs

Deshan Koshala Sumanathilaka, Nicholas Micallef, Julian Hough


Abstract
Recent advances in Large Language Models (LLMs) have significantly reshaped the landscape of Natural Language Processing (NLP). Among the various prompting techniques, few-shot prompting has gained considerable attention for its practicality and effectiveness. This study investigates how few-shot prompting strategies impact the Word Sense Disambiguation (WSD) task, particularly focusing on the biases introduced by imbalanced sample distributions. We use the GLOSSGPT prompting method, an advanced approach for English WSD, to test its effectiveness across five languages: English, German, Spanish, French, and Italian. Our results show that imbalanced few-shot examples can cause incorrect sense predictions in multilingual languages, but this issue does not appear in English. To assess model behavior, we evaluate both the GPT-4o and LLaMA-3.1-70B models and the results highlight the sensitivity of multilingual WSD to sample distribution in few-shot settings, emphasizing the need for balanced and representative prompting strategies.
Anthology ID:
2025.globalnlp-1.2
Volume:
Proceedings of the Workshop on Beyond English: Natural Language Processing for all Languages in an Era of Large Language Models
Month:
September
Year:
2025
Address:
Varna, Bulgaria
Editors:
Sudhansu Bala Das, Pruthwik Mishra, Alok Singh, Shamsuddeen Hassan Muhammad, Asif Ekbal, Uday Kumar Das
Venues:
GlobalNLP | WS
SIG:
Publisher:
INCOMA Ltd., Shoumen, BULGARIA
Note:
Pages:
7–15
Language:
URL:
https://preview.aclanthology.org/corrections-2026-01/2025.globalnlp-1.2/
DOI:
Bibkey:
Cite (ACL):
Deshan Koshala Sumanathilaka, Nicholas Micallef, and Julian Hough. 2025. Prompt Balance Matters: Understanding How Imbalanced Few-Shot Learning Affects Multilingual Sense Disambiguation in LLMs. In Proceedings of the Workshop on Beyond English: Natural Language Processing for all Languages in an Era of Large Language Models, pages 7–15, Varna, Bulgaria. INCOMA Ltd., Shoumen, BULGARIA.
Cite (Informal):
Prompt Balance Matters: Understanding How Imbalanced Few-Shot Learning Affects Multilingual Sense Disambiguation in LLMs (Sumanathilaka et al., GlobalNLP 2025)
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PDF:
https://preview.aclanthology.org/corrections-2026-01/2025.globalnlp-1.2.pdf