Speaking of Pokémon X/Y, something I really like about this game is how apparent is the research done by the developers when designing the region. There are some details and Pokémon designs that reflect that.
The barnacle Pokémon make much sense in this new region, since barnacles grow in the European Atlantic coast that includes parts of France the game is based on. Some species of barnacle are eaten too, especially in southern Europe. Binacle and Barbaracle are part of the Coastal Kalos Dex.
Being based on Jack-o'-Lanterns, Pumpkaboo and Gourgeist also make sense in this region, considering Halloween has its origin in Europe, more specifically England.
Honedge and its evolutions are obviously based on European swords.
Having been in France and several places in Europe (and being European), I can say the Kalos region is faithful (to a degree) to real life France and Europe overall. The Tourist trainers are an obvious allusion (or parody) of the Japanese tourists visiting Europe, judging by their (slightly stereotypical) behavior.
The cabs in Lumiose City have license plates based on the French ones. The numbers/letters are blurry, but that aside, they follow the same format, even having a blue bar on the left part that is common to all European Union license plates. This is one detail I found quite interesting, having seen lots of French cars, even in my country, I instantly noticed it when arriving at Lumiose City.
The architecture of some buildings has that medieval European feel you don't see much anywhere else in the world.
Well, this may be insignificant for some of you, but having been in France several times and being European, I got to see this region in a different way, because it felt much more familiar to me, given the kind of cities and places I've visited before.
You almost could say I had a feeling ...of déjà vu.