Is bread countable

Answer 1

The noun bread is a mass (uncountable) noun. Individual units of bread are expressed as a loaf of bread, loaves of bread, a slice of bread, slices of bread, pieces of bread, etc.

You would not say "There is a bread on the table.", you would say, "There is a piece of bread on the table." or "There is some bread on the table."

The plural forms for a mass noun are reserved 'types of' or 'kinds of'; for example:

If you say, "There are five breads on the table." it means five kinds of bread such as Italian, rye, French, corn, etc.; or "He bought breads." would mean that he bought the sandwich bread, the hot dog rolls, and the hamburger buns, or whatever kind of breads were expected or needed.

Answer 2

Not generally. However, it can be used to describe different types of bread. Bread is a type of food, not a specific item. You don't have a bread - you have a loaf of bread. You can have several loaves of bread, but bread is like blue or free - a type, not a thing.

You could correctly say the "breads of the world" if you are talking about the different ways and different grains people use to bake their breads. Then you are talking about different types of things. Like you could say, "The breads of the Mediterranean" or something.