Programmers are polyglot because they use the best tool for the job. In the enterprise, that language is Java. In the server side, languages include Java, Scala, and Go. In mobile, it’s Java (Android) and Objective-C/Swift (iOS). In games, it’s C# (Unity) and C++. In machine learning and data science, it’s Python and R. In numerical/scientific computing, it’s C++, Python, and Java. The list goes on and on.