CzechDocs: A Multiway Parallel Dataset of Formatted Documents for Minority Languages in Czechia

Researchers have released CzechDocs, a multiway parallel dataset of formatted documents aimed at improving machine translation for minority languages in Czechia, according to a paper submitted on 18 Jun 2026 [1]. The dataset covers Czech and minority languages used in Czechia, primarily Ukrainian and English, with smaller portions of Vietnamese, Russian and other languages [1]. It includes documents in HTML, DOCX, and PDF formats [1]. The project is designed to support the evaluation of machine translation systems that aim to preserve document formatting during translation [1]. A validation subset of the dataset and an evaluation toolkit have been publicly released for further research, while a held-out test split will be reserved for a future shared task focused on document-level translation with formatting preservation [2]. The paper was posted on arXiv, an open-access repository of electronic preprints that, as of November 2024, receives about 24,000 submissions per month [6]. arXiv hosts papers in fields including computer science, mathematics, and physics, and is not peer-reviewed [6]. The repository passed the two-million-article milestone by the end of 2021 [6]. The CzechDocs paper appears with a suite of experimental community tools under the arXivLabs framework, which allows collaborators to develop and share new features directly on the arXiv website [4]. arXivLabs was formalized in 2020 to enable collaborations that share arXiv’s values of openness, community, excellence, and user data privacy [4]. Third-party collaborators in the program have access only to minimal and anonymized user data, and any other use is strictly prohibited without written consent from arXiv [4]. Current arXivLabs projects include the Bibliographic Explorer, which displays citation networks for papers, and the CORE Recommender, which surfaces open-access papers from a global network of repositories [5]. The framework is currently on a hiatus for new proposals while the arXiv development team focuses on modernizing and moving its systems to the cloud [3].