Deploying language negociation settings
If you need to deploy language negociation settings, you can add something like this to your site deployment module.
/**
* Set URL language negociation
*/
function mysite_deploy_update_7045() {
// see https://drupal.org/comment/8476803#comment-8476803
// see http://blog.dcycle.com/blog/60
$negotation = array(
LOCALE_LANGUAGE_NEGOTIATION_URL => 1,
LANGUAGE_NEGOTIATION_DEFAULT => 5,
);
// see https://drupal.org/node/1721410
include_once DRUPAL_ROOT . '/includes/language.inc';
language_negotiation_set(LANGUAGE_TYPE_INTERFACE, $negotation);
}