https://bugs.winehq.org/show_bug.cgi?id=32323
--- Comment #16 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Anastasius Focht from comment #14)
well, a substitute would give you bug 32342 ;-)
Have you verified that? I remember that Erich explained in an email on wine-devel about a year ago his results of the analysis, and he strongly suspected that at least Netflix directly reads the font files instead of using proper API calls. Unfortunately I can't find this mail right now. Unity3D is even more strict, and will only find the fonts if they are located in C:\Windows\Fonts, so I suspect there is also some manual loading step involved.