Nice! Splatoon is indeed perfect family friendly game to play. On a side note if only the forth player knew... He/she would be like: ”it’s alright folks, don’t mind me -l’m here just by accident but I’ll be leaving soon”
It's probably better that you can't voice chat with randos. Better to voice chat with people you know or a community where people don't feel like they can just do whatever with reckless abandon.