Default content not handled correctly with multilingual websites when defaultContentLanguageInSubdir enabled

[CravateRouge]

Preliminary Checks

• This issue is not a duplicate. Before opening a new issue, please search existing issues: https://github.com/HugoBlox/hugo-blox-builder/issues?q=is%3Aissue
• This issue is not a question, feature request, or anything other than a bug report directly related to Hugo Blox Builder. Please post those things on Discord: https://discord.gg/z8wNYzb

Description

When setting defaultContentLanguageInSubdir: true, there are no permalinks automatically generated between the website root pages and the default content subdir pages.

Reproduction Link

https://github.com/CravateRouge/CravateRouge.github.io

Steps to Reproduce

1. Set defaultContentLanguageInSubdir: true in hugo.yaml
2. Put all website content into content\en
3. Remove public folder and relaunch hugo server (empty browser cache to be sure it's pages served by the server and not the browser)
4. Access to a resource as en\terms but from the website root: https://example.com/terms instead of the subdir https://example.com/en/terms
   ...

Expected Result

You should be redirected from https://example.com/terms to https://example.com/en/terms

Actual Result

You have a 404 error.

What Hugo Module versions does your site use?

module github.com/HugoBlox/theme-landing-page

go 1.19

require (
github.com/HugoBlox/hugo-blox-builder/modules/blox-plugin-netlify v1.1.2-0.20231108143325-448ed0e3bd2b
github.com/HugoBlox/hugo-blox-builder/modules/blox-tailwind v0.2.1-0.20240602133901-492e343c2a33
)

What operating system(s) are you seeing the problem on?

Windows, Linux

What browser(s) are you seeing the problem on?

Firefox, Microsoft Edge

Which Hugo Blox template are you using?

Landing Page

What version of Hugo are you using?

0.126.3