AIvengers at SemEval-2026 Task 9: Utilizing Language Specific Encoders for Multilingual Text Classification

Boon Elschenbroich, Lars Britz


Abstract
Polarizing language has evolved from a social media phenomenon into a pervasive feature of public and everyday discourse across cultures and geographies. And, this is not limited to certain countries, but a world wide trend. As we will show, detecting polarization, it’s type and manifestation is not a simple task for one ML model, but, it requires multiple different approaches depending on the language and culture. In this paper, we provide the best methods that we found for each language in all three SemEval 2026 - Task 9 multilingual text classification challenge subtasks. We achieved the best results with language specific pre-trained BERT and RoBERTa models, rather than using a general approach and using a generic multi-language model. Our approach secured a high to medium rank in all subtasks and languages.
Anthology ID:
2026.semeval-1.108
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:
761–776
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.108/
DOI:
Bibkey:
Cite (ACL):
Boon Elschenbroich and Lars Britz. 2026. AIvengers at SemEval-2026 Task 9: Utilizing Language Specific Encoders for Multilingual Text Classification. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 761–776, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
AIvengers at SemEval-2026 Task 9: Utilizing Language Specific Encoders for Multilingual Text Classification (Elschenbroich & Britz, SemEval 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.108.pdf
Supplementarymaterial:
 2026.semeval-1.108.SupplementaryMaterial.zip