Vir die van ons wat nie in die Kaap bly nie...
I think now now could be related to the Afrikaans phrase for doing something as soon as you can. "Nou nou". Translates as “now now”.
Some words my American acquaintances have had problems with are:
"Tekkies", meaning sneakers,
“Plakkies”, as in sandals made from rubber or canvas material.
The are “koppies” or small hills.
The ever present “lekker” used for good, positive, well, tasty or fun.
“Dop” is something you drink, most likely of an alcoholic nature.
And, perhaps most importantly, “mampoer” and “witblits”. Both are mostly homemade substances that are added to various drinks to improve the flavor. They can also be used to light fires, disinfect small cuts and scrapes, clean car windshields… Anything you can think of really. They can be made from anything. Peaches, mielies (corn), mangoes, various wild fruits and most famously, the prickly pear.
Not very alphabetical but perhaps helpful all the same.
Cheers.
Stefan