What language does VeChain use?

Could you kindly clarify for me which programming language VeChain utilizes? I've been curious about the technological foundation of this blockchain platform and its potential applications in various industries. It would be helpful to know the specific language that powers its smart contracts and other core functionalities. Additionally, I'm interested in understanding how this language contributes to VeChain's scalability, security, and interoperability. Could you please elaborate on this matter? Thank you in advance for your assistance.