\definefontfamily[notoFont][rm][Noto Serif CJK KR]
[ it={style:regular,features:{*,slanted}},
sl={style:regular,features:{*,slanted}},
bi={style:bold,features:{*,slanted}},force=yes]
\definefontfamily[notoFont][ss][Noto Sans CJK KR]
[ it={style:regular,features:{*,slanted}},
sl={style:regular,features:{*,slanted}},
bi={style:bold,features:{*,slanted}},force=yes]
\definefontfamily[notoFont][tt][Noto Sans Mono CJK KR]
[ it={style:regular,features:{*,slanted}},
sl={style:regular,features:{*,slanted}},
bi={style:bold,features:{*,slanted}},force=yes]
\definefont[BigFontOnehalf][NotoSansCJKkr-Bold sa 1.5]
\definefont[BigFontTwo][NotoSansCJKkr-Bold sa 2]
%\definefontfamily[notoFont][math][Tex Gyre Termes Math]
\definefontfamily[notoFont][math][Tex Gyre Pagella Math]
\usemodule[simpleslides][style=Swoosh, font=, color=blue,]
\setupTitle[color=darkblue]
\setupbodyfont[notoFont,ss, \NormalSize]
\setuppagenumbering[state=stop]
\starttext
\setupTitle[title={\BigFontTwo 여기에도 수학이?},
author={정 달 영},
institution={숭실대학교},
date={},
]
\setupfootertexts
[\tfx FlexMath \hfill \pagenumber\ / \lastpage]
\placeTitle
\SlideTitle{\BigFontOnehalf 자주듣는 질문들}
\leftaligned{\framed[]{\tfc 수학은 왜 배우나요?}}\vfill
\midaligned{\framed[]{\tfc 수학은 누가 만들었나요?}}\vfill
\rightaligned{\framed[]{\tfc 이거 어디다 써요?}}\vfill
\stoptext
However, if I remove \BigFontTwo and \BigFontOnehalf, it doesn’t show Korean title and here is the log file which tells that it is looking for Korean characters in the math font file.