Problem: How can I use wp_Query to show all posts no matter what language we are on?
Solution: Use $sitepress to switch before wp_Query and switch back to the main language after wp_reset_query();
Example:
global $sitepress;
// save current language
$current_lang = $sitepress->get_current_language();
//get the default language
$default_lang = $sitepress->get_default_language();
//fetch posts in default language
$sitepress->switch_lang($default_lang);
$news = new WP_Query(array('category_name' => 'headlines', 'posts_per_page' => 15, 'orderby' => 'date', 'suppress_filters' => true));
[POST FORMATTING CODE HERE]
endwhile;
wp_reset_query();
$sitepress->switch_lang($current_lang);
