To best describe it in English, you could use the following:
* Mexican sweet bread: This is the most general and accurate term.
* Sweet roll: This captures the shape and texture of the bread.
* Mexican pastry: This is a broader category that includes chato wata.
* Conchitas: This refers to a specific type of chato wata that has a shell-like shape.
Ultimately, the best way to describe chato wata in English depends on the context and the level of detail you want to convey.