Some of the most commonly used programming languages in web development include HTML, CSS, JavaScript, PHP, and Ruby on Rails. The choice of programming language may depend on the specific requirements of the project, as well as the preferences and expertise of the development team. There are numerous other programming languages used in web development, depending on specific requirements and preferences. Some examples include Go, TypeScript, Kotlin, and Rust. It's worth noting that the choice of programming language often depends on factors such as project requirements, developer expertise, scalability needs, performance considerations, and ecosystem support.