When it is valid to call yourself an “

I wish people stopped saying "I'm a Javascript dev" or "I'm a C dev". The language itself means fuckall. The range of things you can do with any language is infinite. I can, for example, write an AWK compielr, yes, an AWK compiler, as I plan to do! Or you could write code that turns C into a macro preprocessing language, not CPP, all of it can become a simple m4 clone! Syntax does not matter, nor do the semantics, it's how you use it that matters.