Coca is called the same in French: un coca (masc.).
The word "coca" in French is feminine.
Because you are using un coca, your phrase means "a coca plant." Un Coca means "a Coke," and une coca means "cocaine."
Coca cola diète
Un coca-cola is masculine.
coca, coke
Coca-Cola was invented in 1885 by John Pemberton in a drugstore in Columbus, Georgia, and was originally called Pemberton's French Wine Coca.
french wine
It is the same brand name in French, although it may be shortened to du Coke.
Coca Cola was first introduced in 1886 in Georgia as a non-alcoholic version of French Wine Cola.
French teenagers eat lunch in the school canteen, or at home if they have time to get there (or when not at school).
If you mean a coconut it's une noix de coco.
Coca is a French Bulldog featured in the show "How We Roll" set in New York. This breed is known for its compact size, playful personality, and distinctive bat-like ears. French Bulldogs are affectionate and make great companions, fitting well into urban lifestyles. Coca serves as a charming and humorous presence in the series.