I could see the voice actor learning a sentence or two but on occasion the bit goes on for a couple minutes. I feel like with a cartoon it wouldn’t be that hard to find a stand in who sounds close enough or use whoever does the dubbing for that language.
https://youtu.be/pU9sHwNKc2c?si=DDSnrAzvMQaekdKu This video might give some clarity.
Amusingly, there’s an issue with the app I use for youtube that means I’m stuck with a dubbed version in a language I don’t speak.