Lang is a new, dynamically-typed programming language designed with a focus on simplicity, flexibility, and robust error handling. Developed from scratch in Go, Lang emphasizes test-driven development and the use of large language models (LLMs) to enhance the interpretability of runtime and logical errors. Its unique approach prioritizes clarity, making it easier for developers to identify and resolve issues, while offering the flexibility to create custom features without complex parsers or lexers. Lang aims to provide an intuitive and powerful tool for both new and experienced developers alike.