If individuals are having difficulty participating in an activity they may need training and that training should be provided. Of course you can not teach everyone Latin but you can use a running translation and incorporate a lot of group responses. Good preparation and foresight are essential prevent boredom. If it happens anyway, humor is your greatest ally. Remember no one can be bored while laughing.
Overload is another ritual fault.
This happens when an individual or the group is asked to do too much. You can not ask the group to hold a candle in one hand, a sprig of holly in the other, and than pass the chalice around. It is a talented individual who can usher, act as choir director, and also be the priest during the same ceremony. Keep things simple, split the ritual duties up, act out the parts of the ritual to make sure there are enough hands to go around. Look for activities in conflict with each other or the environment, chanting or singing while doing a procession uphill is a good example.