Although some people insist (as you do) that "hallucination" is unreasonably anthropomorphic language, it is an extremely common term of art in the field. eg https://dl.acm.org/doi/abs/10.1145/3571730
Secondly, to be anthropormorphic, hallucination would have to be exclusively human, and why should hallucination be a purely human phenomenon? Consider this Stanford study on lab mice https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6711485/ . The purpose of the study is described as being to understand hallucination and it is described by the scientists involved informally as involving hallucinating mice eg here https://www.sciencedaily.com/releases/2019/07/190718145358.h... . It does involve inducing mice to see things which are not there and behave accordingly. Most people would call that a hallucination.
Secondly, to be anthropormorphic, hallucination would have to be exclusively human, and why should hallucination be a purely human phenomenon? Consider this Stanford study on lab mice https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6711485/ . The purpose of the study is described as being to understand hallucination and it is described by the scientists involved informally as involving hallucinating mice eg here https://www.sciencedaily.com/releases/2019/07/190718145358.h... . It does involve inducing mice to see things which are not there and behave accordingly. Most people would call that a hallucination.