gatsby-theme-i18n not redirecting to defaultLang when opening subpath without language prefix

[rlirli]

Describe the bug:
I am using the following configuration file for a gatsby.js page. With the defaultLang set to en, it correctly redirects the user from domain.com to the localized version domain.com/en. However, this redirect does not work with subpaths. Opening domain.com/about leads to 404.

// gatsby-config.js
{
  resolve: `gatsby-theme-i18n`,
  options: {
    defaultLang: `en`,
    prefixDefault: true,
    configPath: require.resolve(`./i18n/config.json`),
    locales: `en de`,
  },
}

Expected behavior:
A user who accesses domain.com/about should by default redirect to domain.com/en/about.

Is there any way to do this with gatsby-theme-i18n directly or other workarounds? Thanks in advance!

I understand this might be by design. Alternatively, I could disable prefixDefault. Then domain.com/about would work, but domain.com/en/bout would lead to 404.

[gpessa]

mmm I feel we are never going to have a solution for this one.

[wollnyst]

Are there any updates on this issue or workarounds?

[ArtyMaury]

I've got a workaround, it's ugly but it works. I duplicated the pages of the default language.
The problem is that if you create a page from scratch that redirects you to the default language (or the user default) the SEO is bad. because of the redirection.

In gatsby-node.js :

exports.onCreatePage = ({ page, actions }) => {
  const { createPage } = actions;
  if (page.path.startsWith("/fr/")) {
    const newPage = { ...page, path: page.path.substring(3) };
    createPage(newPage);
  }
};

[cesarvarela]

More than a year has passed; any suggestions?

From the looks of it seems like using createRedirect is a good option?

[tonoli]

defaultLang

I just cloned the project (https://github.com/gatsbyjs/themes/starters/example-react-intl) and it doesn't redirect the user from domain.com to the localized version domain.com/en

I have a 404 not found on localhost:8000. It should redirect to the local homepage localhost:8000/en