"Corned beef hash" (cubed corned beef and potatoes) is the closest thing to lapskaus that I can buy in my grocery store here in the U.S. Stew comes in bigger, more-randomly shaped pieces and in a gravy/soup-like sauce. Storebought lapskaus is not wet like stew and the pieces tend to be much more uniform in size. More like hash. Of course we often eat a fried egg on top of corned beef hash and I've never heard of anyone eating a fried egg on top of lapskaus... (A search of Google images shows that if you make lapskaus from scratch it does look more like stew, uneven sized pieces and often a gravy-like sauce). The product in the second picture calls it "beef and potato casserole," which is certainly an accurate description in English. So, I argue in favor of calling it "hash" or "casserole." When I hear "stew" I don't picture the kind of lapskaus you buy in a can.