> a cup of americano with a double shot of espresso.
What is that exactly? A cup of percolator coffee with a double shot of espresso into the cup? Or a long black (a double shot of espresso filled up with hot water) plus two extra espresso shots? Or just a long black expressed in a complicated way?
They are basically the same, long black is water with espresso poured on top, americano is espresso with water poured on top.
> Or just a long black expressed in a complicated way?
Presumably this. Coffee terminology is (apparently) not global. I've never seen the term "long black", and I visit cafés quite a lot. Wikipedia lists it as a thing primarily in Australia/New Zealand.
https://en.wikipedia.org/wiki/Long_black