WordPress 4.0.1
Polylang 1.6.1
1. Permalinks: Post name (Default works)
2. Your latest posts
3.
URL modifications:
The language is set from the subdomain name in pretty permalinks (en.domain.com broken, domain.com/en works)
Hide URL language information for default language
Detect browser language:
When the front page is visited, set the language according to the browser preference
Media:
Activate languages and translations for media
The plugin does not work with permalinks type en.domain.com
(domain.com/en works)