I'm working on a language called BQN which I think does just this. The design is done, and we are mainly working on performance and testing for the C implementation (it's also missing some syntax features, but they are all things that don't exist in APL and should be added soon).

https://mlochbaum.github.io/BQN/

The guest of this episode is working on porting J to modern C++. Someone also shared this javascript implementation of APL:

https://github.com/abrudz/ngn-apl#readme

A few. J, K and Q come to mind.

There are many, all with awfully googleable names: j, k, q, etc.

That seems to me to be one of the hardest parts of APL getting adoption, besides it being extremely laborious to read. You can't Google anything.

Go to jsoftware.com - there are links and tons of stuff to read. You'll learn about more searchable terms.