Generating High Quality Synthetic Data for Dutch Medical Conversations

Cecilia Kuan, Aditya Kamlesh Parikh, Henk van den Heuvel


Abstract
Medical conversations offer insights into clinical communication often absent from Electronic Health Records. However, developing reliable clinical Natural Language Processing (NLP) models is hampered by the scarcity of domain-specific datasets, as clinical data are typically inaccessible due to privacy and ethical constraints. To address these challenges, we present a pipeline for generating synthetic Dutch medical dialogues using a Dutch fine-tuned Large Language Model, with real medical conversations serving as linguistic and structural reference. The generated dialogues were evaluated through quantitative metrics and qualitative review by native speakers and medical practitioners. Quantitative analysis revealed strong lexical variety and overly regular turn-taking, suggesting scripted rather than natural conversation flow. Qualitative review produced slightly below-average scores, with raters noting issues in domain specificity and natural expression. The limited correlation between quantitative and qualitative results highlights that numerical metrics alone cannot fully capture linguistic quality. Our findings demonstrate that generating synthetic Dutch medical dialogues is feasible but requires domain knowledge and carefully structured prompting to balance naturalness and structure in conversation. This work provides a foundation for expanding Dutch clinical NLP resources through ethically generated synthetic data.
Anthology ID:
2026.lrec-main.842
Volume:
Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:
May
Year:
2026
Address:
Palma de Mallorca, Spain
Editors:
Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:
LREC
SIG:
Publisher:
ELRA Language Resource Association
Note:
Pages:
10750–10763
Language:
URL:
https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.842/
DOI:
Bibkey:
Cite (ACL):
Cecilia Kuan, Aditya Kamlesh Parikh, and Henk van den Heuvel. 2026. Generating High Quality Synthetic Data for Dutch Medical Conversations. International Conference on Language Resources and Evaluation, main:10750–10763.
Cite (Informal):
Generating High Quality Synthetic Data for Dutch Medical Conversations (Kuan et al., LREC 2026)
Copy Citation:
PDF:
https://preview.aclanthology.org/ingest-lrec/2026.lrec-main.842.pdf