Achei isso aqui, estranho só poder estudar 3 meses.
Department of Home Affairs - Applying for a South African Visa
South African visitors’ visas may be granted for:
- visits to family or friends and also for tourism purposes
- business purposes
- spouse to join a spouse who is in South Africa on a work or study permit
- children to join parents who are in South Africa on work or study permits
- fiancée/ fiancé to join his or her partner with the intension of marrying within 90 days
- study purposes (max stay 3-months)
- charitable or voluntary activities
- research
- conferences
- to work in the production of an movie or show (i.e. in the entertainment industry)
- for medical purposes (max stay 3-months)
- sport events