LangAPI | Agentic i18n via MCP – Consistent locale syncing for Cursor and Claude

Summary: LangAPI is an agentic i18n engine for MCP that audits missing keys and syncs translations across JSON and iOSstrings files using delta-sync. It preserves formatting, key order, and variables, sending only strings for translation while keeping code local.

What it does

LangAPI connects to Cursor, Claude, or VS Code to identify missing translation keys and sync updates with one command. It translates only changed keys, maintains file formatting, and protects placeholders like {{username}}.

Who it's for

It is designed for developers managing internationalization workflows using tools like next-intl, i18next, vue-i18n, or Flutter ARB.

Why it matters

LangAPI solves issues with inconsistent terminology, broken formatting, and accidental translation of variables by automating reliable, format-safe locale syncing.