In order to be able to work with Scala on Intellij, you will need to install the Scala plugin from the Jetbrains plugin market.
From the open project view, you’ll want to head over to the preferences screen from the Intellij Menu:
And then head over to the plugins section:
From here you’ll want to click on “Install Jetbrains plugin…”
And then search for Scala. Once you’ve located the plugin, click the install button and then restart Intellij. Once installed you will need to then create a new project to see the newly available Scala options:
Pick Scala from the options and walk through the rest of the setup and you will then have a new Scala project in Intellij.