I couldn't believe my eyes when I read this post by an Aussie making fun of South African
English....

I am English. I was fortunate enough to be born and raised in an area of the Midlands that has quite a neutral accent. I emigrated to Australia a few years ago and became an Aussie citizen too. The Aussie accent you are referring to is also horrible, (we call it 'strayliun), and I agree with most of what you wrote about it. However, from a personal point of view, I find it preferable to the SA accent.

There's also the Kiwi's, (New Zealanders), with their 'fush 'n' chups etc. However, correct me if I am wrong, but isn't the South African tongue related to the Dutch language?

I guess my main point is that I (personally) believe that NES, with strong regional or national accents, arguably make it more difficult for ESL students to learn, especially when it comes to 'porking the core'.