@Blizz Blizz. I answered your question. You asked "wtf does uncouth mean?"
Well.
It means
"Ingratvs Svvm"
That's the only answer I will ever give you.
As far as what you "know" of latin... That's nothing.
Also, "first language" being latin? THERE IS NO ONE WHO ACTUALLY SPEAKS LATIN AS THEIR NATIVE LANGUAGE, BECAUSE LATIN IS A DEAD LANGUAGE.
Finally, "because Latin sounds cool"... It doesn't, unless you actually know what you're doing. It just is awkward and clunky and anyone who even half-knows Latin laughs at your expense.
I get that you're twelve and it's not your fault that you're that age. But quit pretending to know things you don't.
No one likes arrogant narcissists. DEFINITELY, no one likes narcissists who profess to be more than they actually are.