I just caught this in an o3-pro thought process: "and customizing for low difficulty. কাজ করছে!"

That last set of chars is apparently Bengali for "working!".

I just find it curious that similar "errors" are appearing from multiple different models... what is the training method or reasoning that these alternate languages can creep in, does anyone know?

[0] https://www.reddit.com/r/Bard/comments/18zk2tb/bard_speaking_random_languages/