HarnWorld is also connected to Tekumel, although under the more lawyer-friendly name of Teku. Though HarnWorld is really inspired by EotPT, like the common alphabet, Lakise is obviously inspired by Tsolyani, albeit the setting is much more European and clothed. Related, but I have always wanted to do something in Tekumel, which has to be one of my favorite settings, but it is so weird that it scares off most people. Though I also would want to do all in-character dialogue in Tsolyani, so maybe that is my problem.