I don't design Nimyad by making up rules and then writing texts. I learn the rules through observation of the texts. In fact I was also the one who wrote the texts, but I wasn't aware of the rules when I wrote them. Then when I've seen the pattern in at least two places, I use it in helping me make new words.
Two good examples of patterns I've learned this way:
- caral = place, coli = city; taras = light, tasi = lightning. So the zero-grade form of a word plus -i must mean "a coherent piece of something".
- rejil = human, rejim = wisdom; joril = king, jorim = authority. So if you replace final -l with -m it must mean "the quality which should be exercised by that entity".
- just number them, or similar;
- make up a name for the principle (like the name "lenition" is used for the mutation principle in Scottish Gaelic);
- name them after the first place I saw the principle ("the rejil rule", "the coli rule");
- something else...