Yes, I’m very fond of trying out different languages. My main language for personal projects is Haskell.
> How do you like it?
I haven’t used J for a while, actually, but I recall finding it a bit confusing, especially when rank manipuations are involved. It has a larger vocabulary than most array languages, which I felt made it hard to learn. It was great fun though!
Haskell is one I haven't used yet. The closest I've come to that is a weekend fling with OCaml... much respect for the ML work though!
I hear you for the complexities in J though. I've intentionally limited k-synth to single letter upper case variables and the verbs are also one character... I might regret this at some point.
Have fun! It makes the world a better place!