You install fonts into the Operating System by right clicking on them and choosing Install.
Installed fonts should be available to any software on the system that allows font selection.
The bigger issue, I think, will be typing them out using an alphanumeric keyboard.
That's extremely helpful.
I already have Japanese set up on my pc, it just didn't occur to me to switch into Japanese the way I normally might when typing other things--because I only saw English in the font library... But it totally worked!