[i18n] Turn off automatic locale detection

[WonderfulWorlds]

Is there a way to turn off this feature?

Automatic Locale Detection
When a user visits the application root (generally /), Next.js will try to automatically detect which locale the user prefers based on the Accept-Language header and the current domain.
If a locale other than the default locale is detected, the user will be redirected

I'd like the site to always display in the default language unless explicitly routed to another language.

Thanks

[rovaniemi]

From canary release docs

The automatic locale detection can be disabled with:

// next.config.js
module.exports = {
  i18n: {
    localeDetection: false,
  },
}

When localeDetection is set to false Next.js will no longer automatically redirect based on the user's preferred locale and will only provide locale information detected from either the locale based domain or locale path as described above.

[samuelgoff]

This is broken again, in v12.1.6, 12.2.3 & 12.2.4-canary.9, when you attempt to use next export. If you provide the exact config suggested in the docs (as above), you get:

Error: Specified i18n.locales should be an Array received undefined.

If you do what it tells you, more along the lines of what #18482 & other docs suggest, you end up with a config like this:

  i18n: {
    locales: ['en-US'],
    defaultLocale: 'en-US',
    localeDetection: false,
  },

...and the error changes to this:

Error: i18n support is not compatible with next export.

Not ideal.