>>107834730Honestly, no (except maybe for Buff Frog's kids, since a lot of the time it seems like Buff Frog is the only person they even interact with and so they really should sound Russian).
It's pretty typical for cartoons or stories involving other planets etc. to just have everyone talk like the language of wherever the work was made. Yeah, sometimes you get things that actually focus on the language differences or construct their own, but those are the exception.
