It is a list of all the fast food and restaurant chains that I have tried till 01.2021, in different European countries.
Big Fernand: French "fast good" chain with quality burgers, France
Bistro Romain: French (now disbanded/merged) cheap restaurant chain, France
Buffalo Grill: French grill restaurant chain, France
Chicken Spot: English fast food chain with South Asian and chicken specialities, England and France
Divaka: Bulgarian pub-restaurant chain in Sofia, Bulgaria
Francesca: French-Italian pasta fast food chain, France (and Italy?)
Garage Café: Belarusian café-restaurant chain, Belarus
Hippopotamus: French grill restaurant chain, France
Mama Doma: Belarusian fast food chain (recipes based on blinis) in Belarus
Pomme de Pain: French sandwichs fast food chain, in France, Morocco and Tunisia
Speed Rabbit Pizza: French pizzerias chain in France
Tavern of Master Kanter: French-Alsatian pub-restaurant chain in France
Vasilki: Belarusian restaurant chain of traditional food, Belarus