Faolyn
(she/her)
First, who says that the world is Earth-sized? My world is a big cube, I'll have you know.68 races. Each has to be large enough to be well known so people don't confuse them a high elf with a wood elf with astral elf. Each has to be distinct enough to stand out not just in the visual department but in the cultural department. And saying Drake Dragonborn is one off from the nineth dimension does not cut it, unless you are living near the New Waterdeep Space Interdimensional Citadel.
And can you give me why 68 races could work on an Earth Size planet?
Secondly...