As it currently stands these races are either forced to commit to an interspecies relationship or remain single, which is in my opinion silly. I imagine that this was simply a oversight that was unable to be corrected due to time constraints. As we've seen with people on the PC version of Skyrim, a simple command can turn most NPCS into marriage options so surely it isn't all that hard to do.

I propose that with a future patch a male and female of each of these races are toggled to allow for marriage, the base game of Skyrim already has plenty of NPCS that can be used and repurposed for marriage if the player so chooses. It is certainly about time that Bethesda corrected such a simple thing that really should have been adressed at release, imo.

I'm honestly surprised Bethesda hasn't done anything about it, since they've had plenty of patches and DLC to do so, not to mention Dragonborn adding more Nord marriage options was kind of salt in the wound...

TL;DR? Bethesda, let me marry Kharjo.