alt Hacker Newsdidn't know
> The browser and libraries are all written in C++. (While our own memory-safe Jakt language is in heavy development, it’s not yet ready for use in Ladybird.)
https://awesomekling.github.io/Ladybird-a-new-cross-platform...
only thing I could find - has it been actually used in Ladybird after all?
No, they never completed or adopted their own language. It was back in the SerenityOS days, before the browser forked into its own project.
https://github.com/SerenityOS/jakt