Try C maybe? It is still updated, but only really minor tweaks for optimisation. Also Common lisp specs never changed since the 90s and is still usefull as a "

Try C maybe? It is still updated, but only really minor tweaks for optimisation. Also Common lisp specs never changed since the 90s and is still usefull as a "quick and dirty" language, with few basic knowledge required. But the "basic feature set" can make everything, so the "understand any code" is not really respected. Maybe Clojure is easier to understand (and also has a more limited base feature set, with no CLOS).