Hi, defaultContentLanguageInSubdir: true works well, except that I’d like to keep the root at http://example.com and not change to http://example.com/en/.
Welcome! 
In that case you probably shouldn’t use defaultContentLanguageInSubdir at all.
What you try to do looks to me the same as this doc example, which says:
all content, sitemap, RSS feeds, paginations, and taxonomy pages will be rendered below
/in English (your default content language) and then below/frin French.
Thank you 
That’s what I would do if I’d start a new blog but I’m trying to migrate from my middleman blog that is already setup like that and like to keep the established link structure.
Is that not possible?
# English (main language):
http://example.com
http://example.com/en/blog-post-1
http://example.com/en/blog-post-2
...
# French
http://example.com/fr/
http://example.com/fr/blog-post-1
http://example.com/fr/blog-post-2
...
... more languages