I'm a 34 year old British guy living in Japan, been here for 14 years. Currently a carpenter by trade- not some "ESL folk trying to be kewl".
I'm impressed that such an inept attempt at looking
kewl would come from someone who were
not an ESL guy.
Using lexicon suited to the character is part of the job.
Indeed it is, and you have failed.
He is a late-teens fuccboi in modern day, if he was speaking English he would use those words.
Nope. Maybe a TikTok shut-in would do so, but he's not speaking as would an Anglophone equivalent to the character.
I notice no-one is complaining about my use of the word "Yo", "Bro", etc.
I don't typically bother to complain when the matter is hopeless.
Ya'll need to chill the fuck out.
You need to learn the proper spelling of “y'all”; it is “you all” with the “ou” lost in ellision, not “ya all” with a second “a” lost.
More importantly, you need to understand that an uproar about slang, largely amongst user of the language for which it is a slang, means that
you're doing it wrong.