Song Lyrics Adaptations: Computational Interpretation of the Pentathlon Principle

Barbora Štěpánková, Rudolf Rosa


Abstract
Songs are an integral part of human culture, and they often resonate the most when we can sing them in our native language. However, translating song lyrics presents a unique challenge: maintaining singability, naturalness, and semantic fidelity. In this work, we computationally interpret Low’s Pentathlon Principle of singable translations to be able to properly measure the quality of adapted lyrics, breaking it down into five measurable metrics that reflect the key aspects of singable translations. Building on this foundation, we introduce a text-to-text song lyrics translation system based on generative large language models, designed to meet the Pentathlon Principle’s criteria, without relying on melodies or bilingual training data.We experiment on the English-Czech language pair: we collect a dataset of English-to-Czech bilingual song lyrics and identify the desirable values of the five Pentathlon Principle metrics based on the values achieved by human translators. Through detailed human assessment of automatically generated lyric translations, we confirm the appropriateness of the proposed metrics as well as the general validity of the Pentathlon Principle, with some insights into the variation in people’s individual preferences. All code and data are available at https://github.com/stepankovab/Computational-Interpretation-of-the-Pentathlon-Principle.
Anthology ID:
2025.nlp4dh-1.11
Volume:
Proceedings of the 5th International Conference on Natural Language Processing for Digital Humanities
Month:
May
Year:
2025
Address:
Albuquerque, USA
Editors:
Mika Hämäläinen, Emily Öhman, Yuri Bizzoni, So Miyagawa, Khalid Alnajjar
Venues:
NLP4DH | WS
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Publisher:
Association for Computational Linguistics
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Pages:
117–128
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URL:
https://preview.aclanthology.org/fix-sig-urls/2025.nlp4dh-1.11/
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Cite (ACL):
Barbora Štěpánková and Rudolf Rosa. 2025. Song Lyrics Adaptations: Computational Interpretation of the Pentathlon Principle. In Proceedings of the 5th International Conference on Natural Language Processing for Digital Humanities, pages 117–128, Albuquerque, USA. Association for Computational Linguistics.
Cite (Informal):
Song Lyrics Adaptations: Computational Interpretation of the Pentathlon Principle (Štěpánková & Rosa, NLP4DH 2025)
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https://preview.aclanthology.org/fix-sig-urls/2025.nlp4dh-1.11.pdf