What language is predominantly used for developing Mule applications?

The predominant language used for developing Mule applications is DataWeave, which is specifically designed for transforming data within MuleSoft's Anypoint Platform. DataWeave provides a powerful expression language that allows developers to manipulate data in various formats, including JSON, XML, CSV, and others, seamlessly within their integrations. It is optimized for data transformation tasks, making it a crucial aspect of developing Mule applications, which often require extensive data parsing, mapping, and conversion functionalities.

While other languages like Java, XML, and JavaScript have their roles in developing components and connectors within Mule applications, DataWeave stands out as the primary tool for data manipulation tasks inherent to MuleSoft's integration capabilities. Its specific design for data transformation and ease of use in the context of Mule applications highlights its importance and why it is considered the predominant language.