I’m not going to write too much. Just read this article and thump your head. If this isn’t an all-out admission of the validity of Dembski’s approach, then what is? I wonder if the Royal Society knew these authors were creationists? The article itself is open. Here it is.
BTW, the authors determine the Pictet symbols to be a language. As to the title of this thread, I consider languages to be designed. If you have a differing opinion, I would love to hear what it is!