The default language support for prism is limited (https://github.com/FormidableLabs/prism-react-renderer/blob/master/src/vendor/prism/includeLangs.js) and does not include one of the most commonly used enterprise languages (CSharp / dotnet) or Java. Docusaurus should add other languages to this subset so users can avoid swizzling a component. As another option, additional language support could be a configurable option for the codeblock component.