tag cloud on book cover

I was kind of amused to notice this tag cloud on the cover of the Lonely Planet Lyon travel guide

I assume it's a pseudo-cloud, rather than being based on the actual book text, but it has all elements of a typical cloud: terms vary both in size and brightness.  It would be interesting to compare it with a real tag cloud for the book, but I'm the only one on LibraryThing with it (most people don't put travel guides in their LT, let alone travel guides en français).