well, there are 2 lisp-stat's, one was the original, implemented with xlispdtat, and the other started from the incomplete 1990 Kyoto common lisp implementation, which i fixed up before realising that the overall approach was really dated and useless (no sense of dataframes/tables or groupings).
i also started with Tamas' work, but personal life seöf destructed, and am only recently getting my life back (have had a few false starts).
key for me is dataframes, and Marco gave me what i was looking for - in my CLS repository, there is lots in the comments/docs per file to see what i was thinking of, more of a "novel data science DSL" which was kind of where R is with the tidyverse, but more decision oriented than math oriented....