Avocode outputs pure standards-based web languages CSS3, CSS in JS, Less, Saas, SCSS, Stylus. As for mobile languages, there is Android, Swift, and React Native.
To change the language in the Desktop app, just click the cog icon in the code panel and select your preferred language.
In the dropdown, there is also an option to go into the code template settings, where you can heavily customize the code export templates and much more. If this level of customization is not enough, you can use variables or replace rules to customize the output even more.
NOTE: The language you choose is remembered for each specific design.