Diacríticos:
http://diacritics.typo.cz/
https://underware.nl/latin_plus/character_set/
Cirílico:
https://leksandra.livejournal.com/115861.html
https://cyrillicsly.com/
Griego:
https://irenevl.github.io/Polytonic-tutorial/
https://www.type-together.com/greek-type-anatomy
Devanagari:
http://devanaguide.huertatipografica.com/
Vietnamita:
https://vietnamesetypography.com/