I&#x27;ve made an embedded language called Plumb, which works along similar lines: <a href="http:&#x2F;&#x2F;chriswarbo.net&#x2F;essays&#x2F;plumb" rel="nofollow">http:&#x2F;&#x2F;chriswarbo.net&#x2F;essays&#x2F;plumb</a><p>Plumb is certainly not a Lisp though; it&#x27;s actually a syntax for lambda calculus with de Bruijn indices, which just-so-happens to embed easily in common scripting languages (PHP, JS, Python, etc.).