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Paper Information

lrec2026-main-828

Śmigiel Dataset: Laying Foundations for Investigating Machine-Generated Text Detection in Polish

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Title

Śmigiel Dataset: Laying Foundations for Investigating Machine-Generated Text Detection in Polish

Abstract

We present Śmigiel, the first open dataset for training and evaluating machine-generated text (MGT) in Polish. The dataset includes a collection of human-written text fragments from six domains, which are used to prompt text generation by eight language models capable of producing credible Polish text. In addition to the raw corpus of over 462K generated texts, we also release a cleaned source- and domain-balanced dataset suitable for training and evaluating MGT detectors. Finally, we conduct preliminary experiments with text classifiers, showing that task difficulty depends on the text domain, the generating language model, and the availability of similar data in training. The results indicate that MGT detection in Polish can be approached with general-purpose classifiers that generalize well to new LLMs, but struggle to adapt to genres not represented in the training data.


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