Honestly, if the kids show has NO swearing, then it's safe. The way the character calls themselves and their friends in a "less formal"/"less polite" manner doesn't determine the friendliness of the series. It's language, common language.

Also, if you think such harmless use of language differing from what you want is harmful for children's wellbeing, how do you think people who have watched series with gore and violence in their childhood still behave well as teens and young adults? If you're that vulnerable when it comes to cartoon choices, please take the devices away and try to focus on your child.

Also, imagine a supposedly action cartoon for general audience and not generally for kids, and in the battles, instead of using the harsh language manner which is normal in fights, they use a polite language that doesn't have a further explanation other than "for the friendliness!!1!" and NOT like the character's personality or specific talking style, that's straight up absurd and unrealistic.

If you're THAT strict to the point that one informal quote automatically becomes a part of your cartoon blacklist, consider yourself hypersensitive. Yes, formal language is important, but don't expect your child to be a traditional Victorian era executive in the future. Training your kid to only speak formally is extremely discouraged, actually. To add more, jokes aren't even inappropriate, they just make it more enjoyable for older audiences.

“B-but, the arguments and fights and stuff!!! 🥺” Shut up, please miss. It's called reality. You don't expect everyone to be a pure good sinless characters like you want your cartoon characters to be. They need to learn that everyone has their own flaws, and not everything will go absolutely well. Arguments happen in friendship, fights are optional but also important to learn in life. And if you live in Southeast Asian country this might surprise you... Less polite languages are more common in villages. And again, that's reality. Kids go against the olders ones, the elderly defends young kids, there are grouchy siblings that often yell to their younger siblings.

And now. Who's in the wrong? The cartoon, or you? It's your parenting, miss. If your hypersensitive heart doesn't want your child to watch such harmless series, then don't give them. All good cartoons have their impolite elements, and guess what? Most kids aren't even influenced at such a young age! So... Think again. Probably until you found out you proved yourself wrong.

Your desires will turn your children to be a spoiled, cowardly brats.