南门英语可以翻译成 South Gate English。

关于南门英语的来源，可能是因为南门的地理位置在城市的南部，或者是因为南门是城市中某个特定区域的主要出入口。

一些英文例句：

The South Gate is the main entrance to the old city.

I like to take a walk through the South Gate in the evening.

The South Gate is a popular tourist attraction in our city.