I think this is just a sign that AI is now participating in the normal evolution of language over time. Language has always been about imitating... someone or some group comes up with a word/phrase/saying and uses it, other people hear/read it, and if they like it and/or find it useful, they incorporate it into their lexicon. This process is constant, and words and phrases are tweaked and morphed over the years as trends come and go.

Now, AI is participating in that process. It reads human words, and some of those words end up getting used more based on the algorithm, and then people read those words and copy some of them. This will feed back in to the AI as it ingests more content, and the feedback cycle is complete.