why are many official translations localised?

i genuinely don't understand localising over translating.

is it really that hard to put a small t/n in the footnote explaining hyung or noona? gege or jiejie? instead of removing it entirely.

or to explain national festivals and holidays, like chuseok?

it's not.

esp when the localisation is american bc ik many kor/jpn/chn lingo, or currency, but not this americanised equivalent. translating shouldn't solely focus on the source language but source culture as well.

anyway. fan translation and t/n supremacy.