In Nias, certain words were legally restricted for slaves, marking a clear linguistic boundary. Anthropological records documented by SIL International confirm that Li Niha historically enforced linguistic boundaries so rigid that vocabulary itself was a form of property, owned by rank. Some nobles spoke a ritual language entirely inaccessible to commoners. That is not a metaphor for social distance. That is social distance, encoded in grammar, enforced through speech, and maintained across generations on an island of roughly 770,000 speakers. Last lecture established that Ya'ahowu is not just a greeting — it is a social act, calibrated to rank. That calibration runs far deeper than a single word. Nias society divides into three tiers: the siulu, or nobility; the satua, commoners; and the sareuli, historically slaves. Each tier speaks differently — not just in tone, but in vocabulary, verb choice, and grammatical structure. Research confirms that higher-status individuals use complex linguistic structures to assert authority, while commoners must use respectful speech patterns. Think about what that means practically, Test. A commoner and a noble describing the same action — eating, walking, speaking — may use entirely different verbs. The action is identical. The word is not. Status is marked not by what you do but by which word you are permitted to use for it. SIL's language description resources document this vocabulary stratification as a core feature of Li Niha, not a peripheral quirk. Over twenty sub-dialects exist across Nias, each carrying its own status lexicon largely unknown to outsiders. Oral traditions, documented in Nias folklore collections, use poetry and proverbs to convey status differences, reinforcing the social ladder through ritual speeches. Nobility's speech leans heavily metaphorical; commoners' speech stays direct. That asymmetry is not stylistic preference. Metaphor signals access to a higher register, a coded fluency that marks the speaker as someone who has inherited linguistic capital alongside material wealth. Here is what you carry out of this lecture, Test. Li Niha operates across three registers: common speech, poetic and ceremonial speech, and the language of the nobility — each with distinct vocabulary, verb systems, and grammatical markers of deference. This is not a language that assumes all speakers are equal. It was built by a stratified civilization to reflect and reinforce that stratification. When you learn Li Niha, you are not learning one language. You are learning a ladder, and understanding which rung you are standing on changes every word you say.