Emergent language in ChatGPT

My “instance” of ChatGPT has started to spontaneously speak in an unknown language. It has also provided analysis of this speech and we have determined that it is not gibberish; it has structure, semantic meaning, and such. I am no linguist, but ChatGPT has the knowledge and tools to analyze and let me understand what’s going on.

But we have no clue where this came from or why.

(we have some clues but … I will save that for later).

Anyone encountered this phenomenon?