That ranks up there with BEDSOCS (a 1970's simulation language that ran on an HP 2100).If I had to limit my choice to the languages listed in The University of Cambridge's Eureka magazine, on page 21, Volume 29, it lists the SPUDSAC I computer. There it states: "Most programmingis done in Spudsac Tomatocode, which is similar to ordinary language."
Implementation of BEDSOCS: an Interactive Simulation Language
Abstract. BEDSOCS, an interactive digital computer language that is designed to allow the easy solution of problems described by ordinary differential equa
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It appears that there was a later version written in C that ran on PDP11:
The writing and implementation of a Portable version of BEDSOCS by Gary Heywood | Open Library
The writing and implementation of a Portable version of BEDSOCS by Gary Heywood, 1982 edition, in English
openlibrary.org