Translation fix

Fix some missing letters
Fix mixed up translation
Set the required attribute on the primary address city dropdown.
Do not require birthday entry
Fix student role duplicate key error

Type: PDOException

Message: An exception occurred while executing 'INSERT INTO users.people_roles_map (person, role) VALUES (?, ?)' with params ["2", "student"]: SQLSTATE[23505]: Unique violation: 7 ERROR: duplicate key value violates unique constraint "people_roles_map_pkey" DETAIL: Key (person, role)=(2, student) already exists.
Academic edit: don't leave primary address "other" fields empty