@inproceedings{wang-etal-2025-language-mixing, title = "Language Mixing in Reasoning Language Models: Patterns, Impact, and Internal Causes", author = {Wang, Mingyang and Lange, Lukas and Adel, Heike and Ma, Yunpu and Str{\"o}tgen, Jannik and Schuetze, Hinrich}, editor = "Christodoulopoulos, Christos and Chakraborty, Tanmoy and Rose, Carolyn and Peng, Violet", booktitle = "Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing", month = nov, year = "2025", address = "Suzhou, China", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.132/", pages = "2637--2665", ISBN = "979-8-89176-332-6" }