A personal headcanon I had is that fluffspeak is a language accidentally created by the algorithm, which was a combination of the language mistakes of toddlers when exposed to the web, adults own interpretation of babyish-talk, and uWu language. This resulted in the algorithm promoting videos and search results with the “corrupted” language, which led content farms to change the language of their videos from “standard” English to “fluffspeak” English.
The basis of the idea is in the real world concern of content farms, and their possible influence on children, such as the five finger family videos.
Over time, this leads to the creation of a “fluffspeak research group”, which seeks to replicate various literary and academic works, but written in fluffspeak. This language eventually gets the attention of Hasbio, as the open-source nature of this “baby-ish” language, as well as its ability to have set rules be defined (such as the use of ‘fwuffy’ in the place of most personal pronouns and the letter ‘w’ replacing the letter ‘l’) is of interest to its genetic engineering division, who are trying engineer a talking pet. Basically, in my canon, it is easier to teach a “talking animal” to speak Fluffspeak instead of English. This is how fluffies end up speaking fluffspeak - because the language was ‘tailored’ to them, and vice-versa.
At the same time, more and more people, particularly those that are mentally disadvanatged, also end up speaking Fluffspeak.
This idea became the basis for Wan Pway, which you can read here: "Wan Pway?" by Oculus
You can also read the general lore piece I wrote here: Tracking the Early History of Fluffspeak by Oculus
@klaykid117 while not exactly the same, I had this idea that HasbroHassenfeld was not the real owner of Hasbio, but a secondary company.