Which language does UDDI use?

The UDDI uses the language known as WSDL (Web Service Description Language).

UDDI, or Universal Description, Discovery, and Integration, is a specification for a distributed registry of web services. It’s not tied to a specific programming language. Instead, UDDI defines an XML-based registry schema and a set of SOAP-based protocols for publishing and discovering information about web services. So, the correct answer would be: UDDI doesn’t use a specific programming language; it defines protocols and standards for web service discovery and integration.