The Jukskei River in Gauteng, South Africa.
The name is taken from boerewors (Traditional South Africa
sausage used as a reference to the Afrikaans language) and the Iron Curtain (The border between
communist East and Capitalist
West during the Cold War)
This river lies between Pretoria(largely Afrikaans speaking) and Johannesburg (largely english speaking).
Boerewors Curtain refers to the river that lies between them, You are going behind it when you cross the Juksei river from Johannesburg and emerging from it, crossing from Pretoria.
The language barrier between the two cities.