For an older implementation of programming using a natural language, there's Lingua::Romana::Perligata http://users.monash.edu/~damian/papers/HTML/Perligata.html
Unfortunately for probably most people here, the natural language in question is Latin.
nexto stringum reperimentum da. # $next = pos $
nextum stringo reperimento da. # pos $string = $next;
inserto stringum tum unum tum duo excerpementum da. # $insert = substr($string,1,2);
insertum stringo unum tum duo excerpemento da. # substr($string,1,2) = $insert;
keyis hashus nominamentum da # @keys = keys %hash;
keya hashibus nominamento da # keys %hash = @keys;