She probably has three little Yorkshire Terriers that keep her company along with a cat named "Fluffy" and they are her whole world.
If you show that you have an interest in her traditions, chances are that she will respect you a lot more than if you didn't. Then, unless your ladylove from SA is the same, it's probably best to move along.
When you have a South African girlfriend, you won't need a big brother.
Of course, that doesn't mean that all South African ladies like to swear, some really detest it, but if she's mad, you can be sure that at least one swear word will cross those pretty lips of hers, even if it isn't a bad one.
Mind you, you won't even know it because you don't speak one of the 11 official languages, except English of course.
The Rainbow Nation (as it's known) is full of different cultures, so you need to be sure that you research (or at least pay attention to) some of your lady's traditions.