\font\SILmfont={[/usr/local/texlive/2024/texmf-dist/fonts/opentype/nowacki/kurier/KurierHeavy-Regular.otf]:+clig;+liga;+tlig;+smcp}\SILmfont
\def\SILmfontname{KurierHeavy-Regular; Small Capitals}%