I thought that Marverni was France (i.e. the Gauls). Anyway, sounds like a nice idea, although I don't think the trample thing will work very well.
You may be interested in the "Bretonnia" mod by Burnsaber, which is based on the Warhammer nation of knights and Gallantry, and is themed with a kind of cross between Arthurian England and France. It's here:
http://z7.invisionfree.com/Dom3mods/...p?showtopic=50
Also a "thousand and one nights" type mod has been done before, which you may find interesting:
http://z7.invisionfree.com/Dom3mods/...p?showtopic=34