Unicode displays an exception
I run on the traditional system Notepad ++ 7.3.3 version to see with unicode files and Windows built-in Notepad see a different, Korean will be garbled
안녕하세요!：These words can not be seen
Works for me on win10 with “courier new”. This is probably an issue of the used font which doesn’t contain asian characters. You can change it under properties->style. Either the global style or individually per language.