The translation of "mondo alla rovescia"

The literal translation would be "Reversed World". An expression like "mirror world" might also be used in English to signify the same thing.

There were two famous "Alice" books; "Alice's Adventures in Wonderland" which was followed by "Through The Looking-Glass". "Looking Glass" is an old-fashioned word for mirror ( specchio ). In a mirror, everything is reversed. In the second book, Alice goes through the mirror.

When she arrives she finds some poetry which is written in "mirror writing". It is writing which cannot be read normally. However when hold it up to a mirror, the writing is "reversed" and you are able to read it. It is therefore a "reversed world"; il mondo alla rovescia.