Comment 3 for bug 141376

I was looking at tkabber and it also uses Helvetica for most things it seems. It also defines fonts of family "fixed" but that doesn't sound like a font containing the complete utf-8 glyph set. Tile does:

 if {![catch {tk::pkgconfig get fontsystem} fs] && $fs eq "xft"} {
     variable family "sans-serif"
 } else {
     variable family "Helvetica"
 }

which seems more promising. xft is in 8.5