In my country, we usually don't use number 1, 2 ... as the head number (the section number, the chapter number and so on) but our own characters, for instance, the 一 stands for number 1, the 二 stands ...
I have a mostly English-language document, with fonts defined like this: \usemodule[simplefonts] \setmainfont[MinionPro-Regular] \setsansfont[MyriadPro-Bold] Occassionally, I need to have some ...
ConTeXt has various language codes, listed in this article at the ConTeXt wiki. I do not see Korean listed. I have tried \language[ko], and the document compiles, but I have no way to verify if it is ...