Installing in en_US prompts for language selection a second time

[johnbillion]

Performing a fresh install with no pre-existing wp-config.php will prompt you to select a language as the first step.

If you stick with "English (United States)" you'll be prompted a second time to choose a language when you get to install.php. This is due to an empty string present in $_REQUEST['language'] on setup-config.php which means wp_install_load_language() fails and therefore doesn't populate the language query var in the link to install.php.

We might need to explicitly use en_US when installing in American English to avoid ambiguity with not having selected a language.

[johnbillion]

As reported by Ryan Boren: ​http://make.wordpress.org/flow/2014/07/09/scratch-install-with-setup-config-macnchrome/

[johnbillion]

Fixed in [29058]