I hear different sides of it,
People say that everybody can go to Sovngarde aslong as they acknowledge theirselves with the Norse traditions and live as a great warrior. (Or mage, you got those guys in Sovngarde too.)
Yet others say that Sovngarde is a place for Nords only, no matter what.
And that makes me wonder.
Let's take this for example. A Dunmer shieldmaiden who was found and raised by Nords, and thus grew up with the heart of one. A fierce woman proud to fight with valor. Do you think Shor would accept her, despite her loyalty to Norse traditions? After all, she's born a Mer.