Arcane Spells
The original spells for mages, sorcerers, and bards can be found on the vanilla arcane spell list, last updated for BG2EEv2.5.16.6.
Divine Spells
The original spells for clerics, druids, shamans, rangers, and paladins can be found on the vanilla divine spell list, last updated for BG2EEv2.5.16.6.