josemiori on "[Plugin: Polylang] Home page in one language does not work."

I have a site with english(main), portuguese pr, and spanish sp defined. There is posts in all languages.
Settings->reading>home page is set to latest posts
permalink settings are:
http://blog.miorireal.com/2014/01/30/sample-post/

English and portuguese show well

http://blog.miorireal.com/en/
http://blog.miorireal.com/pt/
but:
http://blog.miorireal.com/es/

presents an error.

Problem seems to happen only in the front page, posts in spanish show just fine.
Thank you.

http://wordpress.org/plugins/polylang/