As for the Mandarin tones, the model might have mixed it up with the tones from a dialect like Cantonese. It’s interesting to discover how much difference a more specific prompt could make.
I don't know if my iOS app is using GPT-4o, but asking it to translate to Cantonese gives you gibberish. It gave me the correct characters, but the Jyutping was completely unrelated. Funny thing is that the model pronounced the incorrect Jyutping plus said the numbers (for the tones) out loud.
