Ferelden vs Fereldan is like America versus American.
Ferelden is the nation.
Fereldan refers to either an individual from Ferelden or as a proper adjective to describe anything pertaining to Ferelden.
The Fifth Blight started in Ferelden.
Fereldans like dogs.
Fereldan commoners typically don’t have last names.
The Hero of Ferelden is Fereldan.