The rear foglight for Yurp influences a lot of tailight design, even for vehicles outside Yurp. There is a requirement for a minimum separation between the nearest points of the foglight and brake light of at least 100mm (~4"), so that a following driver can still clearly see when you brake. So you are tending to see 'linear' or long thin tailight designs to achieve this separation easily.
The French had the best foglights for a long time as they used amber (orange) colour so you could immediately distinguish foglights from tail or brake lights. But they were lost to Yurpeen standardization.
Andrew