Data and code for "One label, two disconnected literatures? A science map of Korean language education research, 1980-2025"

Reproducibility package (analysis code, frozen corpus of 6,055 OpenAlex records retrieved 2026-08-05, frozen identifier list, and figures) for a bibliometric science map of Korean language education research, 1980-2025. Analyses are restricted to the 5,781 records published in 1980-2025. Bibliographic records are from OpenAlex (CC0). — v2 adds permutation-null significance tests, data-driven community detection (ARI/NMI), a placebo split, k-stability silhouettes, and a KCI domestic-citation robustness check (code only; raw KCI data not redistributed).