\setupbodyfont[pagella]

\starttext

% \definefontfeature[nl][language=nld,script=latn]
\setuplanguages[font=auto]
% \setuplanguage [default][font=auto]
% \setuplanguage [nl][font=auto]

\definefontfeature[f:smallcaps][smcp=yes]
\definefontfeature[f:nocaps]   [smcp=no]
\definefontfeature[f:oldstyle] [onum=yes]
\definefontfeature[f:newstyle] [onum=no]

% \enabletrackers[fonts.features]

\startTEXpage[offset=10pt]
    fijn fietsen 123
    \feature{f:oldstyle}
    fijn fietsen 123
    \feature{f:smallcaps}
    fijn fietsen 123
    \feature{f:oldstyle}
    fijn fietsen 123
    \start
    \nl % \feature{nl}
    fijn fietsen 123
    \de
    fijn fietsen 123
    \stop
    fijn fietsen 123
    \feature{f:newstyle}
    fijn fietsen 123
    \feature{f:nocaps}
    fijn fietsen 123
\stopTEXpage

\startTEXpage[offset=10pt]
    \definedfont[lmroman10-regular*default]
    fijn fietsen
    \nl
    fijn fietsen
    \de
    fijn fietsen
\stopTEXpage

\stoptext
