Off topic, but does anyone have a thought on what is the best unicode font? That is, a font that includes all the characters for the 30+ most use languages (including all the double byte languages)? I know every system had a default unicode font that any character can fall back to (I was surprised when I was working with Turkish and the font didn't 3 of the Turkish characters so it fell back to the system font for those three. That was the first time that I learned that text is rendered character by character and if the indicated font doesn't have that character then it will keep going through the fall backs before reaching the system font and then falling back to some default no font character found symbol), but what is the best non-system font that also covers the vast majority (by percentage of people) of modern languages?
I'm involved in fonts for my native language (Sinhalese), and let me tell you: dealing with fonts for multiple languages are is not easy! Some of the Asian languages including Sinhalese are pretty difficult to get right, and glyphs are quite difficult to give a character without breaking their meaning, specially when it comes ZWJs, diacritics, etc.
You can subset a font like Noto to serve your languages, but it will come pretty large. Note that for web, @font-face declarations can set a Unicode character range for each font file, so browser downloads those fonts only when necessary.
I think the architectural limitation of many font formats to 65,536 glyphs means that there aren’t really any good mainstream fonts that contain the entirety of Unicode, but families like Noto have multiple separate fonts that cover most of it.
