These are official translations so they won't even see your comment...though it is a crime they chose the literal translation. I fucking hate it when that happens. Even worse is that these are supposed to be paid proffessional translators, they can't do what they're paid to do properly. It almost caused a huge misunderstanding in the early chapters cus everyone thought it was gonna be another incest story
oh in that case thats even worse.. like i hear this is going to be 18+ later on and seeing him call the guy brother can make it really off putting and weird, idk why official translators want to translate stuff so literally because korean and english are 2 so vastly different languages that you literally cant translate things word-for-word
note to the translators hes probably saying hyung which does not exclusively mean brother, its just a way to call someone older who you're close with...
so please replace the word brother with hyung