source: AskOxford: Types of World EnglishQuote:
South African English
Since 1994 South Africa has had eleven official languages: English, Afrikaans (descended from Dutch), Zulu, Xhosa, and other largely regional African languages. English is the first language of only about 10 per cent of the population, but the second language of many others. (1) The English of native Afrikaners has inevitably influenced the 'standard' English of white South Africans, examples being such informal usages as the affirmative no, as in 'How are you? - No, I'm fine' and the (2) all-purpose response is it?, as in 'She had a baby last week - is it?'
I cannot understand two things in the paragraph:
1) what is the difference of the English of Afrikaners and white South Africans? They speak the same language, don't they?
2) Can we consider it a question tag or is it a response of the other person (echo question)?