Docusaurus i18n automation in 2026: comparing the tools for keeping translated docs in sync

Docusaurus i18n handles the file structure. It doesn't handle the actual translation work or keep it from drifting out of date. Here's what's out there for that part, and where each one fits.

The problem this is actually about

Docusaurus's i18n setup is solid — the framework handles locale routing and file structure fine. The part nobody's site config solves is what happens six months later: English docs keep changing, the Chinese (or French, or Japanese) translation was done once by a volunteer, and now it's quietly out of date. Nobody notices until someone files an issue that a code sample in the translated version doesn't match anymore.

If your team is small and nobody reads the target language well enough to review a translation PR by eye, this gets worse, not better, over time.