I'm looking to create my own scripting language, highly based off of lua (im planning on it being lua but easier to understand for me) so I need to know where the predetermined functions / variables file is, because I would like to edit that. If you have a solution, please comment and let me know!
Every table in the standard library is defined in its own C file. In the src directory of the Lua source package, look for the file whose name is similar to the library name. Global functions are defined in lbaselib.c.