"every programming language" is an infinite set. Every programming language where an interpreter/compiler was implemented once is maybe better. But, when you consider that most programmers have at one point invented their own language, or languages (I cannot really count how much toy languages I have created at some point), it is still way too much and impossible to get them all. Maybe more restrictive would be to take languages which at least 2 people have used at one point. But even then...

The point I'm trying to make is: "Every programming language" will always be wrong.

will do. still "every programming language" - it's not really feasible.

does anyone know how many company/cooperation internal programming language are supposed to exist? is there even a way to estimate it?