What language is NEAR Protocol?

Excuse me, I'm trying to understand the intricacies of the NEAR Protocol, and I have a question about its language foundation. Could you clarify for me, what programming language does the NEAR Protocol primarily utilize? I'm particularly interested in knowing if it's a commonly used language in the blockchain space or if it's something more unique. Also, how does this choice of language affect the functionality and scalability of the protocol? I'm eager to learn more about this fascinating technology.