🚀 go-pugleaf

      Thanks, I hadn't seen that version. I suspect that if I slip in Neue Helvetica
      instead of Univers when I need Turkish accents, no one will notice.




I think you mean, "... those who are not typographically inclined won't notice." In your shoes (and I'm in those shoes on a daily basis), I'd give up and use Myriad Pro. It sounds like Myriad has too much personality for the use to which you wish to put it, but I'd rather be seen as quirky, if the other option available to me is to appear flaky.

      Now all I need is equation typesetting software that can work with Pro
      fonts!




InMath doesn't work for you? I rarely have to work with equations, so perhaps I can't immediately grasp the limitations of InMath, but it worked for me, most of the time. When it didn't work, I wound up roundtripping through LaTeX and placing little bits of outlined equation as inline images, which was a hack I cannot recommend.