Technically speaking, Common Lisp isn't a functional language, yes. Common Lisp is a multi paradigm language and you can do FP with it if you want. But from my

Technically speaking, Common Lisp isn't a functional language, yes. Common Lisp is a multi paradigm language and you can do FP with it if you want. But from my very limited experience with it, it's not the norm. However Lisp, the original, is based on the lambda calculus and that is very much about functional programming. So surely you can do FP with most Lisps, but whether that's the norm or not is another question.