Alternatives to Brill that allow commercial use?
I am currently working on creating a linguistics website called The Online Encyclopedia of Linguistics and Related Fields. Because of its subject matter, the font in question will have to support the International Phonetic Alphabet, as well as some other uncommon characters. I initially wanted to use Brill, but it has a noncommercial-only license. I was also thinking of using Gentium, but its calligraphic vibe doesn’t really fit well with the semi-scholarly purpose of the site. I would absolutely love to use STIX Two Text, but a few IPA symbols (such as the labiodental flap and the symbols for upstep and downstep) are not supported, and the Greek letters βχθ clash visually with the rest of the font.
So put simply, which alternatives to Brill allow commercial use, and don’t have a calligraphic vibe? Would it be worth spending the money to get a custom font that has full IPA support?