The Therapist Neurodiversity Collective uses Identity First Langauge.

We identify people how they wish when conversing with them, but when writing reports, discussing clients or students, or in presentations, we use the non-stigmatizing language of Identity-First. Examples: “Autistic person”. “Autistic child”. “A child identified as Autistic”. “An Autistic student”.

Avoiding Ableist Language: Suggestions for Autism Researchers
“In this commentary, we describe how language is used to communicate about autism within much of autism research can reflect and perpetuate ableist ideologies (i.e., beliefs and practices that discriminate against people with disabilities), whether or not researchers intend to have such effects. Drawing largely from autistic scholarship on this subject, along with research and theory from disability studies and discourse analysis, we define ableism and its realization in linguistic practices, provide a historical overview of ableist language used to describe autism, and review calls from autistic researchers and laypeople to adopt alternative ways of speaking and writing. Finally, we provide several specific avenues to aid autism researchers in reflecting on and adjusting their language choices.”
Bottema-Beutel, K., Kapp, S., Lester, J., Sasson, N., & Hand, B. (2021). Avoiding Ableist Language: Suggestions for Autism Researchers. Autism in Adulthood, 3(1), 18-29. Published Online:18 Mar 2021 https://doi.org/10.1089/aut.2020.0014

Does Language Matter? Identity-First Versus Person-First Language Use in Autism Research: A Response to Vivanti
“There will not always be consensus on what autism is or how we should talk about autistic people—even among autistic people ourselves—but to ignore those autistic voices that have broken through into the academy lest they not be representative of every single autistic person is short-sighted. Linguistic framing, including the use of PFL, has material consequences for the autistic community, especially those who are non-speaking. The priority of research should be to centre autistic people (both speaking and non-speaking, and with, and without learning disabilities) in the conversation around the language used to describe autism and autistic people. If current studies are not representative enough of the entire autistic population the solution is to conduct more research.”
Botha, M., Hanlon, J. & Williams, G.L. Does Language Matter? Identity-First Versus Person-First Language Use in Autism Research: A Response to Vivanti. J Autism Dev Disord (2021). https://doi.org/10.1007/s10803-020-04858-w

Editorial Perspective: The use of person-first language in scholarly writing may accentuate stigma
“Person-first language is used most frequently to refer to children with the most stigmatized disabilities.” ” Studies with participants of all ages, including professionals and scholars, consistently demonstrate that developmental disabilities (e.g. intellectual disability and autism) are more stigmatized than physical disabilities and sensory disabilities. In Web of Science titles, PubMed articles and titles, and Google Scholar articles, person-first language is used most frequently to refer to children with the most stigmatized disabilities (an average 93% for intellectual disability and 75% for autism); person-first language is used less frequently to refer to children with less stigmatized disabilities (18% for deafness; 28% for blindness; 32% for physical disability), and person-first language is used least frequently to refer to children with the least stigmatized condition (<1% for giftedness).”
Gernsbacher MA. Editorial Perspective: The use of person-first language in scholarly writing may accentuate stigma. J Child Psychol Psychiatry. 2017;58(7):859-861. doi:10.1111/jcpp.12706

Which terms should be used to describe autism? Perspectives from the UK autism community
“The term ‘autistic’ was endorsed by a large percentage of autistic adults, family members/friends, and parents but by considerably fewer professionals; ‘person with autism’ was endorsed by almost half of professionals but by fewer autistic adults and parents.”
Kenny L, Hattersley C, Molins B, Buckley C, Povey C, Pellicano E. Which terms should be used to describe autism? Perspectives from the UK autism community. Autism. 2016;20(4):442-462. doi:10.1177/1362361315588200

Reframing Professional Language Around Autism:  Reflecting on our use of language in professional contexts
Psychology Today, June 10, 2020

Reframing Professional Language Around Autism in Practice:  A practical guide to using respectful language in the professional context.
Psychology Today, June 11, 2020