Alright, now here come the playable races for each faction:
United Federation of Planets:
Human
Vulcan
Andorian
Tellarite
Caitian
Efrosian
Bolian
Betazoid
Bajoran
Klingon
Benzite
Ferengi
Trill
Talaxian
Liberated Borg (Human)
Pakled
Saurian
Denobulan
Rigelian
Aenar
Xindi-Primate
Xindi-Arboreal
Xindi-Reptilian
Kelpien
Iotian
Custom Race
Klingon Empire:
Klingon
Gorn
Orion
Nausicaan
Lethean
Ferasan
Liberated Borg (Klingon)
Custom Race
Romulan Republic:
Romulan
Reman
Liberated Borg (Romulan)
Custom Race
Cardassian Union:
Cardassian
Ferengi Alliance:
Ferengi
Borg Cooperative:
Liberated Borg
Tal Shiar:
Romulan
True Way Alliance:
Cardassian
Jem'Hadar
Vorta
Changeling
New Republic:
Human
Twi'lek
Wookiee
Togruta
Rodian
Zabrak
Mon Calamari
Quarren
Ithorian
Duros
Pantoran
Talz
Sullustan
Abednedo
Toydarian
Gungan
Droid
Custom Race
Resistance:
Human
Twi'lek
Wookiee
Mon Calamari
Abednedo
Sullustan
Droid
Custom Race
Chiss Ascendancy:
Chiss
First Order:
Human
Droid
Civilian/Mercenary/Bounty Hunter/Smuggler:
All of the Above Races, as well as:
Breen
Tholian
Tzenkethi
Hirogen
Neimoidian
Zygerrian
Custom Race