Yes. In Afrikaans, slim is a false friend for English speakers.
In Afrikaans, slim usually means clever, intelligent, or smart. It does not normally mean thin the way it does in English.
So:
For thin, Afrikaans would more likely use words like maer or skraal, depending on context.
Traditionally, yes:
So these words can refer either to cousins or to a sibling’s child, depending on context.
In this sentence, they clearly mean male cousin and female cousin.
A native English speaker may notice that nig looks strange because of English, but in Afrikaans it is simply a normal kinship word with a completely different meaning.
Because after dat, Afrikaans normally uses subordinate-clause word order, where the finite verb goes to the end.
Compare:
This is one of the big word-order differences between English and Afrikaans.
After verbs like sê (say), Afrikaans very often leaves out dat.
So both of these are possible:
The version without dat is very common and natural.
A useful thing to notice is this:
That is why sy kan ... looks more straightforward than dat my neef slim is.
Yes, here sy means she.
That can be confusing, because sy can also mean his in other sentences. The job it is doing in the sentence tells you which meaning it has.
Here it comes before kan and acts as the subject of the clause:
So in this sentence, it is definitely she.
net so goed means just as well or equally well.
A very literal breakdown is:
Afrikaans often uses goed where English would use well. In other words, goed can work adverbially in many everyday contexts.
So:
Because kan is a modal verb, meaning can, and modal verbs in Afrikaans are followed by another verb in the infinitive.
That second verb often comes later in the clause, usually at the end:
So kan carries the tense, and kook stays in its basic verb form.