I took a look at Cniglic. It seems similar to an idea that I noted as a candidate for an eventual add-on, to use diacritic marks as emotion indicators. The problem that this was intended to solve is that it seems overly limiting to be restricted to the one emotion indicator "!", and to have to put it at the end of the sentence. I much prefer the idea of having many such indicators, and being able to apply them freely throughout sentences. Implementing them as optional diacritic marks above vowels seemed like the best bet. But I haven't gone anywhere with the basic idea, except that at one point I began looking for a "definitive" list of human emotional states. I don't remember ever finding a list that I thought was reliable.