Index: src/wp-admin/includes/plugin-install.php
===================================================================
--- src/wp-admin/includes/plugin-install.php	(revision 30931)
+++ src/wp-admin/includes/plugin-install.php	(working copy)
@@ -339,9 +339,10 @@
 	}

 	$api = plugins_api( 'plugin_information', array(
-		'slug' => wp_unslash( $_REQUEST['plugin'] ),
+		'slug'   => wp_unslash( $_REQUEST['plugin'] ),
 		'is_ssl' => is_ssl(),
-		'fields' => array( 'banners' => true, 'reviews' => true )
+		'fields' => array( 'banners' => true, 'reviews' => true ),
+		'locale' => get_locale()
 	) );

 	if ( is_wp_error( $api ) ) {