ImgMT: Wikipedia-based Dataset For Evaluating Text-in-Image Translation

Šárka Uramová, Petar Petrov, Josef Jon, Ondřej Bojar, Michal Novák


Abstract
Text-in-image translation aims to translate all textual content embedded in an image. In Text Image Translation (TIT), the output is translated text; In-Image Machine Translation (IIMT) additionally renders the translation back into the image. We introduce ImgMT, a massively multilingual dataset and benchmark mined from localized SVG illustrations on Wikimedia Commons, focusing on diagrams, maps, and infographics. ImgMT contains 35,612 aligned image pairs grouped into 1,855 image sets, spanning 129 languages, 20+ writing systems, and 4,886 language pairs.

We propose a multi-level evaluation protocol that measures source-side text-region detection and OCR accuracy alongside target-side translation quality. We benchmark several multimodal large language models and a dedicated TIT system in English-to-X and X-to-English settings, and find that the source language and writing system substantially affect TIT quality. Finally, we show that ImgMT is not well suited for isolating the contribution of visual information in multimodal translation.
Anthology ID:
2026.wmt-main.43
Volume:
Proceedings of the Eleventh Conference on Machine Translation
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Barry Haddow, Tom Kocmi, Philipp Koehn, Christof Monz
Venues:
WMT | WS
SIG:
SIGMT
Publisher:
Association for Computational Linguistics
Note:
Pages:
765–781
Language:
URL:
https://aclanthology.org/2026.wmt-main.43/
DOI:
Bibkey:
Cite (ACL):
Šárka Uramová, Petar Petrov, Josef Jon, Ondřej Bojar, and Michal Novák. 2026. ImgMT: Wikipedia-based Dataset For Evaluating Text-in-Image Translation. In Proceedings of the Eleventh Conference on Machine Translation, pages 765–781, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
ImgMT: Wikipedia-based Dataset For Evaluating Text-in-Image Translation (Uramová et al., WMT 2026)
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PDF:
https://aclanthology.org/2026.wmt-main.43.pdf