Since I don't see a list here and it's pretty public knowledge to the best of my memory Luka V4X is receiving the following banks:
ENGLISH: Straight, Soft.
JAPANESE: Hard, Soft.
EVEC JAPANESE (Used by phoneme extensions from either Hard/Soft e.g. [a | a2] I think): Power 1, Power 2, Soft, Whisper, Native, Husky, Cute, Dark and Falsetto.
Yes, Luka has something like 13 banks when you total it up, but you have to access the EVEC ones manually and they aren't full banks (just vowels and breaths (not sure on the breaths part))