What are you talking about? I understand OP has the perspective of writers, but let’s say you’re asking an LLM to explain a concept and it uses green words that are actually more difficult to understand. Or you ask for an analogy to explain a topic and the analogy doesn’t quite land because the description used “gray” instead of “overcast”.
Watermarking or not, LLM are already using RNG to pick a variant between different words/expressions.