Font handling should support non-western languages. Looking at how this gets done in most threeJS samples, it is an afterthought. You can't put text on the screen without the right kind of fonts in the threeJS framework.
Prior Work
This. is a good approach:
https://protectwise.github.io/troika/troika-three-text/
Look at non-web frameworks to see how this is done (processing, open frameworks) and determine if this is really a bundling exercise, and simply, make it easy to provide a full pallet of fonts even when it might need to be loaded the first time.
How do other frameworks handle this when the author of code doesn't care about this aspect of localization.