Shout out to the author for remembering the Shakespeare Programming Language exists! [1] Next on the list, which I am tempted to do, is build in support for LOLCODE [2] and Piet [3], though I'm not sure how the latter would work.
Yeah, LOLCODE should fit right in but Piet is tricky. I don't think a proper Piet editor can be added, but a possibility is to map each color to a relevant character and set up the right background colors for Piet in the editor - let me know if that makes sense in usability. Some added functionality for exporting as PNG may be required too.