The article isn't well informed ... e.g., it says "In all the languages I know of, you can't break out of a loop from an inner loop" but you can do so in all the languages it mentions at the top: Rust, Zig, and Myrddin, as well as many others.
No language I actually use has it but I know about it from playing around with a java 1.1 parser project I’ve been slowly working on.