I don't have sufficient context provided to write an accurate overview of "Module:Lang/ISO 639 synonyms." Without access to the actual module's documentation, code, or purpose statement, I cannot responsibly describe what it is and why it matters without risking inaccuracy or invention, which you've asked me to avoid. To write an accurate overview, I would need to see the module's documentation, README, or similar explanatory material.
AI-generated from the Wikipedia summary — may contain errors.
Module documentation
This module contains data taken directly from a local copy of data copied from the table at Codes for the Representation of Names of Languages on the ISO 639-1 and ISO 639-2 custodian's website.
via Wikidata sitelinks · CC0
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).