Taking a look at the South African culture – verbal

Direct Communication: Though mannerisms in communication vary among ethnic groups, most South Africans have a direct style of communication. They generally speak confidently and straight to the point. Their intention and meaning is very self-evident. For example, a South African is likely to openly point out when you are wrong or disagree with you on the spot. This can come across as overly assertive or blunt. Keep in mind that this is not generally the intention. Moreover, they are likely to appreciate similar honesty and not take offence to it as such.
Raised Voices: Afrikaners and black South Africans (particularly females) naturally tend to speak at a louder volume than those from the English-speaking West. It is also normal for black South Africans to continue conversations by shouting when situated at a distance from one another (e.g. standing across the road or a room).
Silence: Silence can be interpreted as a sign that the conversation is not engaging or that something is wrong. South Africans can grow uncomfortable with prolonged periods of silence and may naturally speak to fill it.
Location and Formality: Communication may vary depending on the location, with more traditional approaches being used in rural areas and people adopting more cosmopolitan approaches in urban areas. For example, Afrikaans people might find it very rude to refer to elders without using the prefix “Oom” (uncle) or “Tannie” (auntie) while in a small town. In an urban environment they might simply use the formal “Meneer”, “Mevrou” or “Juffrou” (Mr, Mrs or Miss) when talking about older people.