Does anyone know if there is a way to detect if a font has been substituted when opening an svg in Illustrator? Ideally, I'd like to be able to detect it programmatically via jsx script but first I'm just looking to see if there is any visual indication that a font has been substituted.
Interesting: As you said, there appears to be no mechanism in Illustrator to detect missing fonts in SVG files. I had the same results on a test file... it just substituted Arial without any notice in my case, with no mention in the Font list of my intended font. Don't know why that would be, because if you place such a file in InDesign, the missing fonts ARE indicated in the Find/Replace Font dialog, so why not Illustrator.
In the SVG code itself (open in a text editor), the required font is very plainly indicated, so it seems like an easy thing to do... maybe a script can dig into that??