Vatican II did have something to say about the wedding liturgy:
The marriage rite now found in the Roman Ritual is to be revised and enriched in such a way that the grace of the sacrament is more clearly signified and the duties of the spouses are taught.
So, in part, the intent is to catechize the couple through the ritual.
“If any regions are wont to use other praiseworthy customs and ceremonies when celebrating the sacrament of matrimony, the sacred Synod earnestly desires that these by all means be retained” (Council of Trent, Session XXIV, November 11, 1563, On Reform, chap. I. Cf. Roman Ritual, title VIII, chap. II, n. 6.).
A substantial freedom is granted to conferences of bishops. They are empowered to draw up their own Rite of Marriage within the bounds of previous council teaching on authority outside of Rome.
Moreover the competent territorial ecclesiastical authority mentioned in Art. 22, 52, of this Constitution is free to draw up its own rite suited to the usages of place and people, according to the provision of Art. 63. But the rite must always conform to the law that the priest assisting at the marriage must ask for and obtain the consent of the contracting parties.
We’re still waiting for the latest revision of the Rite of Marriage. With all the fuss on the Roman Missal, this one has been buried for over a decade.