South African English has many accents, even amongst native speakers. There is Cultivated, Common and Broad, roughly equivalent to upper class, middle class and lower class. My accent (I live in Cape Town) is somewhere in the middle.
Diphthongs can often get monophthongised, so that the single vowel is the only thing to tell you what diphthong was meant. Here is a cool example.
/a:/ for /aɪ/ (price)
/ɑː/ for /aʊ/ (mouth)
“That is a file” “That is a /fa:l/”
“That is a foul” “That is a /fɑːl/”