I’ve witnessed several religious ceremonies, (and indeed my first marriage was a Church wedding!) and from experience couples aren’t given the opportunity to tailor their ceremonies.
Nimekuwa alishuhudia sherehe kadhaa wa dini, (na kwa kweli ndoa yangu ya kwanza ilikuwa harusi Kanisa!) na kutokana na uzoefu wanandoa hawapewi nafasi ya kurekebisha sherehe zao.