If you were in this position I could try and help. Lisp is by far my favourite family of languages and any new success stories would be great. However, and th

If you were in this position I could try and help. Lisp is by far my favourite family of languages and any new success stories would be great. However, and this answers your second question, I did not understand why this question was important to the OP. I do not know but assume the most important thing for a YC company is the founders, their background, their product and their passion. Whichever programming language they use is of no consequence at all IMHO. (Unless we're talking Brainfuck or Malbolge.)