That's just your victorian judgementalness coming out. It has nothing to do with vocabulary. And it certainly has nothing to do with how many languages your kid knows.

Anyone who grew up with conservative parents rolled their eyes at your post. "Ok dad".

Btw, she just learned to swear when you're not around. And when you eventually find this out, rest assured it's not that you failed her vocabulary, it's just because she met some friends that swear.