Further questions to be resolved

-There are 3 commonly spoken languages in the lands of Saen, one of which was brought from farther south in the imperial days, one of which is native farther north and perhaps has some commonality with the indigenous tongues of Jadus, and a third category which has made ingress from farther east.  This last category may be actually more than one family.

-The lands of Saen are fairly urbanized but some areas of hinterland remain even in the later campaigns.

-Technology:  It's hard to determine just where to place the tech level of the later campaigns.  It probably is, realistically, pre-industrial.  This should have been resolved.  It could have some degree of FF style technology which wouldn't have a place in medieval campaigns, but not full on industry.

-The men of Saen might realistically be compared to the Caucasian race in general, and the same is also true of some of the other areas.  In particular it has strong elements of the Nordic, Alpine and Mediterranean races - though probably the former two are dominant in Saen.

-The whole continent is loosely unified behind the Imperial idea from ages past, but unity has been traditionally hard to come by.  I'm thinking of developing Kingdoms and Leagues more specifically, and soon.  The later campaigns saw the rise of the Dark Imperium, and this is a topic in itself worthy of further explanation.

-Is there some kind of colonial situation going on?  Best develop the localities before addressing this altogether.

-The status of the demihumans and humanoids and the rest of the less natural denizens has likewise to be addressed in a more satisfactory way.

-All of this owes to the problems of whimsy that come from youthful exuberance.  It was started as a DND campaign but it evolved beyond that rather quickly, in ways that don't quite make sense in retrospect.  It doesn't have to be too rigidly answered, but some improvement is certainly desirable.