Multilingual default route without lang

Hi,
I wanted to know if it's possible to have default language on root / instead of /lang. I.e:

http://multilingual.com/ instead of http://multilingual.com/en
http://multilingual.com/blog instead of http://multilingual/en/blog

Thanks

Start by tracing how the router registers and matches language-prefixed routes. Define the expected behavior for `/` and `/blog` alongside existing `/en` paths, then verify that default-language URLs route correctly without breaking explicitly prefixed URLs.

Written by the indexing model from the issue text.