How we can make an approved language?

Answer 1

you cannot submit entire languages .its either you got approved lessons or quizzes

Answer 2

I have a link for you to go through.
https://tomassetti.me/resources-create-programming-languages/

Answer 3

Well you can fork another language Esperanto --> Ido. But nobody learns it.
Jokes aside, you can make a language, but without a compiler or interpreter, it'll remain esoteric.