Citizenship, Language, Visa Status, and Visa Type fields values are stored in tables that are accessible through Core.  New values can be added to these tables as needed.

To add a new table value:
  1. Go to Core > Settings > General Settings Table Values
  2. Select the Edit Pencil Icon button next to the table that needs to be changed.
  3. Select + Add Option and enter the Value Name in the new space created
           User-added image