BGL files and fonts

I'm a "BGL file format" fan and I'd like to tell you that your app is working great. Only a few adjustments to improve the customization of the interface (colors, fonts, languages) and it will be perfect.
Anyway, I'm here to ask you a couple of things about babylon files and fonts. In the past I created a few glossaries and I used custom fonts in them (strings such as: "<span style='font-family:"Stone Sans PhoneticIPA";color:black'>").
Can I use the additional/custom TTF file? And if so, where should I put it?
Thanks a lot for your effort, even though I had to pay for it
P.S.
Please contact me if you need to localize the app in Italian.
Anyway, I'm here to ask you a couple of things about babylon files and fonts. In the past I created a few glossaries and I used custom fonts in them (strings such as: "<span style='font-family:"Stone Sans PhoneticIPA";color:black'>").
Can I use the additional/custom TTF file? And if so, where should I put it?
Thanks a lot for your effort, even though I had to pay for it

P.S.
Please contact me if you need to localize the app in Italian.