As far as I have been able to notice so far, the spells are not "recited" in any way. You see some light effects, many wow effects, but in practice in D&D the Verbal, Somatic and Material components are by no means an option for the enchanters.
Otherwise spells like: Silence - 2nd level would make no sense.
In BG1 and BG2 the spellcasters had that ancient Latin-like voice effect when casting a spell, which was very nice and spot on. I think a similar effect, but I hope even better, CANNOT BE MISSING IN BG3. What do you think?