If your only category distinctions lie between Lisp and non-Lisp languages, then yeah, pretty much all languages do it. The real question is if you consider a

If your only category distinctions lie between Lisp and non-Lisp languages, then yeah, pretty much all languages do it. The real question is if you consider another symbol to be more appropiate. Since the comma correlates well to the purpose in question in natural languages, it's the most obvious choice.