Precision over Scale: A Polish–Silesian Benchmark and a Translation System Outperforming Open-Source and Commercial Models

Grzegorz Kulik, Mikołaj Pokrywka, Adam Jatowt, Wojciech Kusa


Abstract
Dialectal machine translation remains challenging due to limited data and strong linguistic variation not captured by standard benchmarks, which often assume standardized and well–edited text. We study Polish–Silesian MT using neural and rule–based systems, evaluating on SiLTT — a new Pol–Szl testset, alongside established BOUQuET and FLORES benchmarks. Results show our rule–based system is consistently strongest on SiLTT and BOUQuET datasets and that TranslateGemma fine–tuned on a curated dataset improves over strong neural baselines but does not surpass the rule–based system in dialectal settings. We release SiLTT and our best neural model to support further research.
Anthology ID:
2026.findings-emnlp.2056
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2026
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
Findings
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
43783–43792
Language:
URL:
https://aclanthology.org/2026.findings-emnlp.2056/
DOI:
Bibkey:
Cite (ACL):
Grzegorz Kulik, Mikołaj Pokrywka, Adam Jatowt, and Wojciech Kusa. 2026. Precision over Scale: A Polish–Silesian Benchmark and a Translation System Outperforming Open-Source and Commercial Models. In Findings of the Association for Computational Linguistics: EMNLP 2026, pages 43783–43792, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Precision over Scale: A Polish–Silesian Benchmark and a Translation System Outperforming Open-Source and Commercial Models (Kulik et al., Findings 2026)
Copy Citation:
PDF:
https://aclanthology.org/2026.findings-emnlp.2056.pdf