Hi Joern Kottmann!
Attached text4363.png, with two versions with less colours. However, when trying to add a parse tree, or even text, it was all too small, and I couldn't find a way to position things in a way that it would be clear what it was, and so that it could also be useful for favicon / t-shirts / sticker / etc.
Give me some time and I will try it again after some thinking. In case anyone has some picture to illustrate a few possibilities, it would be easier to vectorize and add to the logo by following a reference