I would add Pascal to the mix. It used to rule the world of computing.
Delphi was/is used quite a bit professionally.
It ran in many places in the 70s and was quite popular at the time of Turbo Pascal.
TP compiler was created by Anders Hejlsberg, that later became chief architect of Delphi, that convinced Microsoft to hire him to work as chief architect on C# and now he's a core developer on Typescript.
https://www.youtube.com/watch?v=YqxeLodyyqA&ab_channel=elmus...
Not sure about the source though.