Think the answer to this is in their booklet. But 30kg. per case rings a bell. Two cases per passenger max also rings a bell.
No there is no luggage limit as such but you will need to store your suitcases in your cabin (for which there is sapce) so majority of people might take two suitcases and a small bag for a 14nt cruise sharing a cabin for two.
No but remember it must all fit in your cabin. Suit cases can gnerally be placed under the beds althouigh it has been known for the cabin steward to arrange storage for any that are too big so to fit.
Large "squashy" bags can be stored under the beds easily, so you could take quite a few of these.
Provided that each suitcase does not weigh more than 22kgs each then if you can store them in your cabin you can take as much as you wish. My wife and I take one suitcase each for cruises of up to 17 nights and add an additional suitcase between us for cruises over this length. This ensures that we can slide them under the beds, open if they are fairly large.
As much as you want.