apple/

hat

	HAT: Hallucination Annotation for Translation




	


	🧭 Table of Contents

Overview Usage Data Creation Process Data Statistics Dataset Structure Paper Abstract Citation License

HAT (Hallucination Annotation for Translation) is a large-scale dataset for hallucination detection in machine translation (MT).It is released as part of our publication at ACL 2026 (paper).

350,959 span-level annotated samples
38 language pairs
~8,000-10,000… See the full description on the dataset page: https://huggingface.co/datasets/apple/hat.