Translation as Augmentation: Effect of Translated Data on Assessment of Difficulty

Yiheng Wu, Jue Hou, Roman Yangarber


Abstract
Reliable Text Difficulty Assessment is a prerequisite for valid text simplification workflows and personalized learning applications. However, the development of robust assessment models is severely hindered by a critical bottleneck: the scarcity of expert-annotated corpora containing fine-grained difficulty levels (e.g., CEFR), particularly for lower-resource languages. This paper addresses this data scarcity problem in the context of a low-resource European language. We propose a cross-lingual data augmentation strategy that leverages machine translation to transfer labeled resources from high-resource languages to the target low-resource language. We train BERT-based regression models to predict difficulty scores and investigate whether synthetic, translated data can effectively supplement native training sets. Our experiments demonstrate that augmenting scarce native data with machine-translated corpora significantly improves the accuracy of difficulty estimation, offering a viable solution for languages lacking extensive expert annotations.
Anthology ID:
2026.determit-1.5
Volume:
Proceedings of the 2nd Workshop on Evaluating Text Difficulty in a Multilingual Context (DeTermIt! 2026)
Month:
May
Year:
2026
Address:
Palma, Mallorca (Spain)
Editors:
Giorgio Maria Di Nunzio, Federica Vezzani, Liana Ermakova, Hosein Azarbonyad, Jaap Kamps
Venues:
DeTermIt | WS
SIG:
Publisher:
ELRA Language Resources Association (ELRA)
Note:
Pages:
42–50
Language:
External URL:
https://lrec.elra.info/lrec2026-ws-determit-05
DOI:
10.63317/3mmqujpgyua5
Bibkey:
Cite (ACL):
Yiheng Wu, Jue Hou, and Roman Yangarber. 2026. Translation as Augmentation: Effect of Translated Data on Assessment of Difficulty. In Proceedings of the 2nd Workshop on Evaluating Text Difficulty in a Multilingual Context (DeTermIt! 2026), pages 42–50, Palma, Mallorca (Spain). ELRA Language Resources Association (ELRA).
Cite (Informal):
Translation as Augmentation: Effect of Translated Data on Assessment of Difficulty (Wu et al., DeTermIt 2026)
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