Nice idea but I cannot understand that.
Provided blc interpreters are minified beyond recognition and lambda-calculus definitions doesn't tell me much.
As for Iota, huh, I feel stupid. I'd have to reimplement it differently because js does not support tail recursion; their implementation simply doesn't work. tbh I have no idea how approach this.
Adding an additional esoteric languages is a sound idea and I might do just that; but lc is not my cup of tea.
edit: Are you aware of any js implementation of any of those languages that works? or non-js that is written in readable code?