It's my belief that all foods can be considered "world cuisine." It's because of man's mobility from thousands of years ago when food stuff were eaten by most travelers who traveled by ship, camel, horse, or wagons. When a group of any culture moves to another location, they prepare foods of their home country which eventually becomes shared in restaurants to all customers.
Today's explosion on cultural foods all over the world is the evidence. One can even go to any country, and find foods from other countries.
In our neighborhood in Silicon Valley, we have Italian, Chinese, Japanese, Korean, Vietnamese, Indian, German,, Middle Eastern, African, Mexican, English, all manners of steak restaurants, bbq, fast food, and combinations of all of them in one foodcourt or restaurant.