I’m writing a piece in Sanskrit. Unfortunately Academico does not appear to support all the diacritics found in Sanskrit transliteration.
Here is what it looks like in Times New Roman. Notice, among other places, the “n” in “guna” has a small dot underneath it as does the s in “punyabhiyosca” and the m in “viryam:”
Here is what you get if you use Academico. Apparently, the letters noted above do not exist in the current Academico font and are replaced with a very unattractive generic font.

Could Academico be extended? I realize this may appear to be an esoteric request, but speaking personally, I’ll be setting quite a bit of Sanskrit and this is not that uncommon a language for music composition. At least one entire opera was composed in Sanskrit.
There are millions of text fonts in the wild: I’d suggest that it would be easier (and quicker) to find a font that is both suitable for lyrics and that contains the glyphs you want.
I recommend Brill. I’m a fan.
Good idea (but I don’t think they’re glyphs but rather letters with diacriticals that are not used in Latin-based languages like French and Spanish).
One reason I requested it is because Academico is the default font (and that’s what I was using). I wrote half the piece and didn’t notice the problem until I zoomed in on the lyrics and realized they weren’t in the font. Because I wasn’t expecting a problem, it never occurred to me to look.
I switched to Times New Roman (but I’ll look at Brill).
Agreed that this is not the most pressing of feature requests (understatement!). I wouldn’t have troubled the forum but I wrote Steinberg and they said I should post it here.
Each letter with a different diacritic is a different unicode glyph in the font. Either they’re in the font, or they’re not. You need a font that has those glyphs.
Thanks. Always happy to have my terminology clarified.