I agree with Joziboi, Jan Smuts would fit a little better than DeKlerk (Less controversy).

A few suggestions,
Unique ability: Each port adds an additional trade route (given South Africa was established because of the need for safe trade routes)
Unique Building: Mine, each mine gives +1 gold +1 production.
Unique Unit: 32 Battalion - Replaces Marines

Also might suggest the civ emblem be changed to a Springbok, similar to the Aussie Kangaroo or New Zealand Kiwi that you see on military aircraft.

Please put Nelson Mandela for the South African Leader!

Another possible mod idea if you make another South Africa Mod.
Leader. B.J. Vorster.
Unique Unit. Eland 90.
Unique Ability. (Same as in this mod)

I can see why you didn't make Mandela the leader, but why not a more iconic leader like Paul Kruger instead?

Wait I have an even better idea:
Leader: Julius Malema
Unique ability: Load shedding - every couple of turns make production 0 in all cities for that turn.
Unique unit: Toi-toi'ing mob (replaces a mid-game tier infantry unit) - automatically pillage every tile they pass over (even friendly tiles), can automatically appear when happyness is low (not a barbarian version of it).
Unique building: Nkandla - Costs alot of gold and happyness, gives culture.

That is the real South African civilization ^

ons vir jou suid-afrika

I think it's a decent effort.
If it was my call, Jan Smuts purely because he is the kind of figure that would suit the game (Boer General, British & South African Prime Minister, scholar as well as a founding member of the UN and the League of Nations).

It could have been worse. Just be glad he didn't choose Jacob Zuma as the president. You wouldn't believe it but as i was reading the comments we had a load shed(South African planed power cut).

It should be san not bushman

I wanted to think outside the box my dude. 999/1000 people would have done Mandela.

No Nelson Mandela. 0/10 get gud kid