What programming languages were used to program programming languages?

Answer 1

It's a little bit more complex than this, when you want to create a new programming language you have to design its syntax, than you have to write a compiler, or an interpreter, to make the code in your new programming language work. The compiler, or interpreter, could be written in any language, but usually is c++ because of its high performance. Hope this answered your question.

PS: this could help understand https://medium.freecodecamp.org/the-programming-language-pipeline-91d3f449c919

Answer 2

thanks