If you are interested in tiny lisp like languages, this gitlab could be of interest to you.
Full disclaimer, I came across it a few years back as I am the maintainer of arkscript (which will get faster and better in the v4, so that data about it there is accurate as a baseline of « it should be at least this good but can be even better now »).
I use camel case for methods and functions and snake case for variables. And pascal case for constants. Why? I don’t really know, it makes for a nice distinction I guess.