This talk examines the cognitive and practical benefits of learning multiple programming languages. We'll discuss several languages worth considering across different domains and use cases, along with practical criteria for choosing which language to learn next based on your current skills and interests. The session will also cover useful tools, resources, and methods that can help learning a new language. By the end, you'll have a clearer understanding of how becoming a polyglot programmer can enhance your development practice and concrete steps for expanding your programming toolkit.