Diet Coke is also branded as what in many markets?

In many markets, Diet Coke is branded as Coca-Cola Light.

Coca-Cola introduced Diet Coke in 1982 as a sugar-free, low-calorie cola. The company used the Diet Coke name primarily in the United States and several other markets, while Coca-Cola Light became the preferred branding in much of Europe, Latin America, Africa and parts of Asia. Some markets also use the name Coke Light.

The product is not simply Coca-Cola with less sugar. Diet Coke has its own recipe and was developed from the company’s earlier Tab diet-cola work rather than being a direct low-calorie version of the original Coca-Cola formula. Its commonly distributed formulation has historically relied on artificial sweeteners, especially aspartame, though formulas can vary by country and over time.

Diet Coke and Coca-Cola Light may share the same broad product identity while differing in branding, packaging and sometimes taste. They should not be confused with Coca-Cola Zero Sugar, which was introduced later and was designed to more closely resemble the taste profile of Coca-Cola.