BQN[1] (an APL variant). There is something really beautiful/elegant to me about composing higher order functions in a purely point free way. Array programming is a nice application of this, and this one has the best ergonomics.
Go is lovely - it’s super pragmatic and things just work.
Forth. I learned it very late in my programming career which started with Java. It just feels like home in a way that no other language ever has.
Mostly useless tho
Clojurescript. I used it to build an MVP proof of concept for work and now have to watch a small team re-write it using Typescript and Angular
They’re still not at feature parity with 2x the team, 2x the time and 3x the lines of code.
C!
My job is typical web TypeScript + Python
But in my spare time I’ve been deep diving C and loving it for the most part. Though I really hate strings in C!
Common Lisp.
I really like Lua, it's simple and easy to compile
Crystal; compiled Ruby!
Swift and SwiftUI is fun for my own projects. I use Python and C++ for work.