"Coca-Cola" City
What could be more American than Coca-Cola?
...KGB bosses are even believed to have built an “American town” in Ukraine so spies could learn how to live secretly in the US.
In the town, the trainee agents apparently drove American cars using American traffic regulations and watched American movies.
The Soviets insisted “Coca-Cola City”, as it became known, never existed but those that attended the academy say otherwise.
New York Post
Illegals are trained in their own special classes in KGB headquarters and in their fake country of origin, not in "Coca-Cola cities."
San Diego Reader
So it is not one of those Russian words (like Kompromat) which was adopted into English spy jargon...just a quintessentially American one.