When you voluntarily acquire a foreign citizenship, you do not have voting rights in Korea because you lose your Korean citizenship when the foreign citizenship is obtained.
However, persons in the process of changing nationality are still considered to have nationality of the Republic of Korea and therefore do have the right to vote.
Persons without domestic residence registrations or overseas Koreans who have not reported domestic residence -> Overseas voters
Persons with domestic residence registrations or persons who have reported domestic residence, such as Koreans traveling, studying or working abroad who intent to vote abroad. -> OVERSEAS ABSENTEE APPLICANTS
☞ A permanent resident who has reported domestic residence and intends to vote overseas should file an Overseas Absentee Application.