I know enough Afrikaans that with context I know what somebody is saying despite not knowing a lot of the words. I can't seem to read it anymore.
I can understand basic Dutch, depending on the accent
I was a 40%er most of the Gr11 and matric but somehow got over 50% in my final results
You can be kak at a second language in school and still ace it. For Afrikaans, they usually give away the essay questions more or less so most kids memorize the work.
The teachers kids (I'm sure you have seen this in the Indian community) also usually ace the papers because their parents are giving them inside info behind the scenes. In the Indian community, there is a very high link between "academic high achievers" and teachers kids and it's not always because these kids are smarter but they get inside info as well.
It also depends on the teacher you have. I did well in Afrikaans for the most part in ended with a strong B in matric because I ended up with a new teacher who did not have enough time to take a liking to me. Had it been my Grade 10-11 teacher, I'd have got an A.
They mark on reputation and if they have a family/friend connection to said student, also mark higher.
Basically, our education system does not actually teach kids languages.