Heroku supports a wide range of programming languages, making it a versatile platform for developers. The primary languages include Ruby, Java, Node.js, Python, PHP, Go, Scala, Clojure, and Rust. Each of these languages has a dedicated build pack that helps streamline the deployment process, enabling developers to easily deploy and manage applications. Heroku is particularly renowned for its focus on Ruby on Rails applications, but it has expanded its support to accommodate modern web development needs across various programming environments. Additionally, users can create custom build packs if they wish to deploy applications developed in other languages or frameworks not officially supported by Heroku. It is always advisable to check the official Heroku documentation for the most current and detailed information regarding language support and the available build packs.