@lalalandsynth
Place The Fonts In A Folder And Rename It To "Fonts"
Then Call It At The Beginning Of Your Script
Engine.loadFontAs("{PROJECT_FOLDER}Fonts/YOURFONT.ttf", "YOURFONTNAME");
And Select It In Property Editor
Font.png
Also You Can Use That Font To Act As A Global / Default Level By Using Below Code:
Engine.setGlobalFont("YOURFONTNAMEHERE");
Important Note: It Won't Show Up Until You Save Your Project Xml And Then Close / Reopen HISE.