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    <abstract>Natural language tasks like Named Entity Recognition (NER) in the clinical domain on non-English texts can be very time-consuming and expensive due to the lack of annotated data. Cross-lingual transfer (CLT) is a way to circumvent this issue thanks to the ability of multilingual large language models to be fine-tuned on a specific task in one language and to provide high accuracy for the same task in another language. However, other methods leveraging translation models can be used to perform NER without annotated data in the target language, by either translating the training set or test set. This paper compares cross-lingual transfer with these two alternative methods, to perform clinical NER in French and in German without any training data in those languages. To this end, we release MedNERF a medical NER test set extracted from French drug prescriptions and annotated with the same guidelines as an English dataset. Through extensive experiments on this dataset and on a German medical dataset (Frei and Kramer, 2021), we show that translation-based methods can achieve similar performance to CLT but require more care in their design. And while they can take advantage of monolingual clinical language models, those do not guarantee better results than large general-purpose multilingual models, whether with cross-lingual transfer or translation.</abstract>
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%0 Conference Proceedings
%T Multilingual Clinical NER: Translation or Cross-lingual Transfer?
%A Gaschi, Félix
%A Fontaine, Xavier
%A Rastin, Parisa
%A Toussaint, Yannick
%Y Naumann, Tristan
%Y Ben Abacha, Asma
%Y Bethard, Steven
%Y Roberts, Kirk
%Y Rumshisky, Anna
%S Proceedings of the 5th Clinical Natural Language Processing Workshop
%D 2023
%8 July
%I Association for Computational Linguistics
%C Toronto, Canada
%F gaschi-etal-2023-multilingual
%X Natural language tasks like Named Entity Recognition (NER) in the clinical domain on non-English texts can be very time-consuming and expensive due to the lack of annotated data. Cross-lingual transfer (CLT) is a way to circumvent this issue thanks to the ability of multilingual large language models to be fine-tuned on a specific task in one language and to provide high accuracy for the same task in another language. However, other methods leveraging translation models can be used to perform NER without annotated data in the target language, by either translating the training set or test set. This paper compares cross-lingual transfer with these two alternative methods, to perform clinical NER in French and in German without any training data in those languages. To this end, we release MedNERF a medical NER test set extracted from French drug prescriptions and annotated with the same guidelines as an English dataset. Through extensive experiments on this dataset and on a German medical dataset (Frei and Kramer, 2021), we show that translation-based methods can achieve similar performance to CLT but require more care in their design. And while they can take advantage of monolingual clinical language models, those do not guarantee better results than large general-purpose multilingual models, whether with cross-lingual transfer or translation.
%R 10.18653/v1/2023.clinicalnlp-1.34
%U https://aclanthology.org/2023.clinicalnlp-1.34
%U https://doi.org/10.18653/v1/2023.clinicalnlp-1.34
%P 289-311

Markdown (Informal)

[Multilingual Clinical NER: Translation or Cross-lingual Transfer?](https://aclanthology.org/2023.clinicalnlp-1.34) (Gaschi et al., ClinicalNLP 2023)

• Multilingual Clinical NER: Translation or Cross-lingual Transfer? (Gaschi et al., ClinicalNLP 2023)

ACL

• Félix Gaschi, Xavier Fontaine, Parisa Rastin, and Yannick Toussaint. 2023. Multilingual Clinical NER: Translation or Cross-lingual Transfer?. In Proceedings of the 5th Clinical Natural Language Processing Workshop, pages 289–311, Toronto, Canada. Association for Computational Linguistics.