The only high-level language more proven is Lisp, but most of the procedures are written in lower case so I don't think it's serious enough to be a business oriented language.
Also, business people don't like things to think for themselves, so Lisp would be risky in that respect.
Not Fortran, in which you originally needed to SHOUT, though you couldn't go SHOUTING? It was good enough to implement one of the earliest RDBs, after all, which sounds business-like.
Also, business people don't like things to think for themselves, so Lisp would be risky in that respect.