% \definefont[xxx][name:SourceHanSansSCMedium]
% \definefont[yyy][name:SourceHanSansTCMedium]
% \definefont[zzz][name:SourceHanSansMedium]
% \definefont[www][name:SourceHanSansKMedium]

\definefont[xxx][name:sourcehansansscmedium]
\definefont[yyy][name:sourcehansanstcmedium]
\definefont[zzz][name:sourcehansansmedium]
\definefont[www][name:sourcehansanskmedium]

\enabletrackers[fonts.names]

\starttext

% {\zzz Using SourceHanSans-Medium.ttc (OTC: OpenType Collection)}

\xxx 骨
\yyy 骨
\zzz 骨
\www 骨

\xxx 曜
\yyy 曜
\zzz 曜
\www 曜

\stoptext
