It's an expert system. You can create if-then condtions. "If under attack, attack nearest enemy." It looks like lisp because every statement needs to be surrounded by parentheses, but it's not anything like lisp.

It's extremely limited, at least if you expect it to be a complete programming language. On the other hand, it's very easy to learn and use, which is what it's designed for.

The random map scripting is a programming language I believe. You can create scripts that generate maps.