@inproceedings{hoang-etal-2026-spark, title = "{S}p{ARK}: An Embarrassingly Simple Sparse Watermarking in {LLM}s with Enhanced Text Quality", author = "Hoang, Duy Cao and Le, Thanh Quoc Hung and Chu, Rui and Li, Ping and Zhao, Weijie and Lao, Yingjie and Doan, Khoa D", editor = "Demberg, Vera and Inui, Kentaro and Marquez, Llu{\'i}s", booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EACL} 2026", month = mar, year = "2026", address = "Rabat, Morocco", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-eacl/2026.findings-eacl.240/", pages = "4603--4626", ISBN = "979-8-89176-386-9" }