Autism and Language @KrisGl
@fdrake more or less covered it. What Baggs is doing is not language. Strictly speaking, "language" refers to human language, which has quite specific attributes that distinguish it from other forms of communication.* Of course, metaphorically, language can be anything, "the language of love" etc. The metaphorical use reduces language to very generalised forms of communication and human interaction, which adds some colour to the word at the expense of obscuring its actual meaning.
It might help to locate language as a subset of human communication, which is a subset of human expression. Baggs is certainly expressing their self---in way that could be considered artistic or interesting, but what she's communicating if anything remains obscure. And even if she is communicating something and even if you can describe that something in language, it doesn't make their form of expression linguistic.
Suppose, I am in an interview and I fold my arms to communicate my nervousness. That is an expression that communicates something, "discomfort", which is publicly interpretable and which is often described as "body language". But it is not language. Folding one's arms could conceivably be linguistic as part of a system of sign language, but in that case it could mean anything. The severing of the link between the expressive and the semantic is part of what makes language what it is. The very fact that Baggs seems to be freely expressing their self negates her own thesis.
Also, the first couple of lines of her speech show they don't know what language is, don't care, or perhaps are deliberately misleading their audience (I'm not making any presumptions, just describing possibilities). What they are doing might or might not be significant artistically or psychologically or socially (in terms of understanding how better to relate to the autistic community) or it might just be someone trying to get attention by making an outlandish claim and leveraging their obvious vulnerability in doing so, but in no sense does it suggest a rethinking of language because what they are doing has nothing to do with language except in the metaphorical sense.
*Here's a basic list of the major properties of language:
https://www.ff.umb.sk/app/cmsFile.php?disposition=a&ID=6765#:~:text=These%20six%20properties%20of%20displacement,core%20features%20of%20human%20language.
Edited: for preferred pronouns