Bitmap fonts are easy. I made a truetype font in the 1990s using CorelDraw so I know that's not hard. Keyboard maps, again trivial. And don't discount the power of a felt tip when it comes to marking a keyboard.
There's also a difference between making a font and making a good, generally usable font, just like I as a 7th grader could program, but they weren't good, generally usable programs.