Opentype makes this impossible. A glyph has an index of a UINT16, so you can't fit all of the ~143k Unicode characters. There are some attempts at font famili

Opentype makes this impossible. A glyph has an index of a UINT16, so you can't fit all of the ~143k Unicode characters. There are some attempts at font families to cover the majority of characters. Like Noto ( https://fonts.google.com/noto/fonts https://fonts.google.com/noto/fonts ), broken out into different fonts for different regions. Or, Unifont's ( http://www.unifoundry.com/ http://www.unifoundry.com/ ) goal of gathering the first 65536 code points in one font, though it leaves a lot to be desired if you actually use it as a font.