Currently conventional races are...
Human
Centaur
Half-Orc
Gnome
Dwarf
Goblinoid
Harpy
Enslaved Giant*
Enslaved Minotaur*
I will also allow a few, rare and limited races for people who I believe can roleplay them.
Full Blood Orc
Freeborne Minotaur
Freeborne Giant
Fey
Spirit
Construct
Planars
Planetouched
Illithid
*Enslaved refers to Giants and Minotaur that have been enslaved in the past, and therefor live amongst humans, usually as low-class labourers. Enslaved Giants and Minotaur do not necessarily have to be slaves. It's just the closest word I could come up with.