Whitespace (programming language)
Whitespace is an esoteric programming language with syntax where only whitespace characters (space, tab and newline) have meaning – contrasting typical languages that largely ignore whitespace characters. As a consequence of its syntax, Whitespace source code can be contained within the whitespace of code written in a language that ignores whitespace – making the text a polyglot.
Source: Wikipedia — Whitespace (programming language) (CC BY-SA 4.0)