Pinpointing the "1st" programming language is difficult as a consequence of different definitions. Ada Lovelace's 1843 algorithm for Charles Babbage's Analytical Engine is usually credited, however it was not executed on a real machine. The very first device-executed languages emerged in the 1940s, with Quick Code (1949) and Plankalkül (1943-1945) https://blog.hellomybd.com/the-first-programming-language/