\font\SILmfont={[/usr/local/texlive/2024/texmf-dist/fonts/opentype/ibm/plex/IBMPlexSerif-SemiBoldItalic.otf]:+clig;+liga;+tlig;+ss05}\SILmfont
\def\SILmfontname{IBM Plex Serif SmBld Italic; Stylistic Set 5}%