\font\SILmfont={[/usr/local/texlive/2024/texmf-dist/fonts/truetype/public/theanooldstyle/TheanoOldStyle-Regular.ttf]:+clig;+liga;+tlig;+ss05}\SILmfont
\def\SILmfontname{Theano Old Style Regular; Stylistic Set 5}%
