MINDS at SemEval-2026 Task 9: A Multi-Paradigm Approach to Cross-Lingual Polarization Detection

Angelo Iannielli, Samuele Maroli, Marco Roberto, Stefano Sammartino, Valentino Vacirca, Claudio Savelli, Riccardo Coppola, Flavio Giobergia


Abstract
Online polarization has become a central challenge in digital discourse, characterized by hostility, identity-based division, and culturally dependent expressions that vary across languages. Automatically detecting such phenomena is particularly difficult in multilingual settings, where semantic nuance and implicit rhetoric complicate cross-lingual generalization.In this context, we participate in POLAR, a shared task at SemEval 2026 on multilingual polarization detection and categorization across 22 languages. We compare three modeling paradigms: multilingual encoder fine-tuning, translation-based transfer learning, and prompting-based generative reasoning. For the multi-label categorization task, we introduce a two-stage cascaded architecture to mitigate false positives under severe class imbalance.Our results show that multilingual encoders achieve the most robust performance for binary detection, whereas reasoning-based prompting is competitive for fine-grained category classification. This comparative study highlights the strengths and limitations of each paradigm for cross-lingual polarization analysis.
Anthology ID:
2026.semeval-1.313
Volume:
Proceedings of the 20th International Workshop on Semantic Evaluation (2026)
Month:
July
Year:
2026
Address:
San Diego, California, USA
Editors:
Ekaterina Kochmar, Debanjan Ghosh, Kai North, Mamoru Komachi
Venues:
SemEval | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
2475–2486
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URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.313/
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Cite (ACL):
Angelo Iannielli, Samuele Maroli, Marco Roberto, Stefano Sammartino, Valentino Vacirca, Claudio Savelli, Riccardo Coppola, and Flavio Giobergia. 2026. MINDS at SemEval-2026 Task 9: A Multi-Paradigm Approach to Cross-Lingual Polarization Detection. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 2475–2486, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
MINDS at SemEval-2026 Task 9: A Multi-Paradigm Approach to Cross-Lingual Polarization Detection (Iannielli et al., SemEval 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.313.pdf