---
title: "LSN / ISN (Lenguaje de Signos Nicaragüense / Idioma de Signos Nicaragüense)"
type: "entity"
entity_kind: "term"
status: "watching"
canonical_name: "LSN / ISN"
aliases: ["Lenguaje de Signos Nicaragüense","Idioma de Signos Nicaragüense"]
first_seen: "2026-08-24T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["Nicaraguan Sign Language","cohort effect (age of entry)","Ann Senghas"]
seek_code_commit: "17d9798"
---


Kegl & Iwata's (1989) two-stage naming distinction within the Nicaraguan Sign
Language literature: LSN (Lenguaje de Signos Nicaragüense) names the first
cohort's partially-crystallized pidgin, ISN (Idioma de Signos Nicaragüense)
the nativized creole the younger, second cohort produced from it. Surfaced
this session (per Senghas 1995, pp. 36–37) as a lead worth a future,
more granular claim-note — not yet worked up into one.