Nikolaos Spanos


2025

pdf bib
AILS-NTUA at SemEval-2025 Task 3: Leveraging Large Language Models and Translation Strategies for Multilingual Hallucination Detection
Dimitra Karkani | Maria Lymperaiou | George Filandrianos | Nikolaos Spanos | Athanasios Voulodimos | Giorgos Stamou
Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025)

Multilingual hallucination detection stands as an underexplored challenge, which the Mu-SHROOM shared task seeks to address. In this work, we propose an efficient, training-free LLM prompting strategy that enhances detection by translating multilingual text spans into English. Our approach achieves competitive rankings across multiple languages, securing two first positions in low-resource languages. The consistency of our results highlights the effectiveness of our translation strategy for hallucination detection, demonstrating its applicability regardless of the source language.