Index: wp-includes/feed-rss2.php
===================================================================
--- wp-includes/feed-rss2.php	(revision 19762)
+++ wp-includes/feed-rss2.php	(working copy)
@@ -26,7 +26,7 @@
 	<link><?php bloginfo_rss('url') ?></link>
 	<description><?php bloginfo_rss("description") ?></description>
 	<lastBuildDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></lastBuildDate>
-	<language><?php echo get_option('rss_language'); ?></language>
+	<language><?php bloginfo_rss( 'language' ); ?></language>
 	<sy:updatePeriod><?php echo apply_filters( 'rss_update_period', 'hourly' ); ?></sy:updatePeriod>
 	<sy:updateFrequency><?php echo apply_filters( 'rss_update_frequency', '1' ); ?></sy:updateFrequency>
 	<?php do_action('rss2_head'); ?>
Index: wp-includes/feed-atom.php
===================================================================
--- wp-includes/feed-atom.php	(revision 19762)
+++ wp-includes/feed-atom.php	(working copy)
@@ -12,7 +12,7 @@
 <feed
   xmlns="http://www.w3.org/2005/Atom"
   xmlns:thr="http://purl.org/syndication/thread/1.0"
-  xml:lang="<?php echo get_option('rss_language'); ?>"
+  xml:lang="<?php bloginfo_rss( 'language' ); ?>"
   xml:base="<?php bloginfo_rss('url') ?>/wp-atom.php"
   <?php do_action('atom_ns'); ?>
  >
Index: wp-includes/feed-rss.php
===================================================================
--- wp-includes/feed-rss.php	(revision 19762)
+++ wp-includes/feed-rss.php	(working copy)
@@ -16,7 +16,7 @@
 	<description><?php bloginfo_rss('description') ?></description>
 	<lastBuildDate><?php echo mysql2date('D, d M Y H:i:s +0000', get_lastpostmodified('GMT'), false); ?></lastBuildDate>
 	<docs>http://backend.userland.com/rss092</docs>
-	<language><?php echo get_option('rss_language'); ?></language>
+	<language><?php bloginfo_rss( 'language' ); ?></language>
 	<?php do_action('rss_head'); ?>
 
 <?php while (have_posts()) : the_post(); ?>
Index: wp-includes/feed-atom-comments.php
===================================================================
--- wp-includes/feed-atom-comments.php	(revision 19762)
+++ wp-includes/feed-atom-comments.php	(working copy)
@@ -10,7 +10,7 @@
 ?>
 <feed
 	xmlns="http://www.w3.org/2005/Atom"
-	xml:lang="<?php echo get_option('rss_language'); ?>"
+	xml:lang="<?php bloginfo_rss( 'language' ); ?>"
 	xmlns:thr="http://purl.org/syndication/thread/1.0"
 	<?php do_action('atom_ns'); do_action('atom_comments_ns'); ?>
 >
Index: wp-app.php
===================================================================
--- wp-app.php	(revision 19762)
+++ wp-app.php	(working copy)
@@ -1077,7 +1077,7 @@
 		$prev_page = ($page - 1) < 1 ? null : $page - 1;
 		$last_page = ((int)$last_page == 1 || (int)$last_page == 0) ? null : (int) $last_page;
 		$self_page = $page > 1 ? $page : null;
-?><feed xmlns="<?php echo $this->ATOM_NS ?>" xmlns:app="<?php echo $this->ATOMPUB_NS ?>" xml:lang="<?php echo get_option('rss_language'); ?>" <?php do_action('app_ns'); ?> >
+?><feed xmlns="<?php echo $this->ATOM_NS ?>" xmlns:app="<?php echo $this->ATOMPUB_NS ?>" xml:lang="<?php bloginfo_rss( 'language' ); ?>" <?php do_action('app_ns'); ?> >
 <id><?php $this->the_entries_url() ?></id>
 <updated><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></updated>
 <title type="text"><?php bloginfo_rss('name') ?></title>
@@ -1150,7 +1150,7 @@
 	 */
 	function echo_entry() { ?>
 <entry xmlns="<?php echo $this->ATOM_NS ?>"
-       xmlns:app="<?php echo $this->ATOMPUB_NS ?>" xml:lang="<?php echo get_option('rss_language'); ?>">
+       xmlns:app="<?php echo $this->ATOMPUB_NS ?>" xml:lang="<?php bloginfo_rss( 'language' ); ?>">
 	<id><?php the_guid( $GLOBALS['post']->ID ); ?></id>
 <?php list($content_type, $content) = prep_atom_text_construct(get_the_title()); ?>
 	<title type="<?php echo $content_type ?>"><?php echo $content ?></title>
Index: wp-admin/includes/schema.php
===================================================================
--- wp-admin/includes/schema.php	(revision 19780)
+++ wp-admin/includes/schema.php	(working copy)
@@ -409,7 +409,6 @@
 	'comment_whitelist' => 1,
 	'blacklist_keys' => '',
 	'comment_registration' => 0,
-	'rss_language' => 'en',
 	'html_type' => 'text/html',
 
 	// 1.5.1
@@ -524,7 +523,7 @@
 	if ( !__get_option('home') ) update_option('home', $guessurl);
 
 	// Delete unused options
-	$unusedoptions = array ('blodotgsping_url', 'bodyterminator', 'emailtestonly', 'phoneemail_separator', 'smilies_directory', 'subjectprefix', 'use_bbcode', 'use_blodotgsping', 'use_phoneemail', 'use_quicktags', 'use_weblogsping', 'weblogs_cache_file', 'use_preview', 'use_htmltrans', 'smilies_directory', 'fileupload_allowedusers', 'use_phoneemail', 'default_post_status', 'default_post_category', 'archive_mode', 'time_difference', 'links_minadminlevel', 'links_use_adminlevels', 'links_rating_type', 'links_rating_char', 'links_rating_ignore_zero', 'links_rating_single_image', 'links_rating_image0', 'links_rating_image1', 'links_rating_image2', 'links_rating_image3', 'links_rating_image4', 'links_rating_image5', 'links_rating_image6', 'links_rating_image7', 'links_rating_image8', 'links_rating_image9', 'weblogs_cacheminutes', 'comment_allowed_tags', 'search_engine_friendly_urls', 'default_geourl_lat', 'default_geourl_lon', 'use_default_geourl', 'weblogs_xml_url', 'new_users_can_blog', '_wpnonce', '_wp_http_referer', 'Update', 'action', 'rich_editing', 'autosave_interval', 'deactivated_plugins', 'can_compress_scripts', 'page_uris', 'update_core', 'update_plugins', 'update_themes', 'doing_cron', 'random_seed', 'rss_excerpt_length', 'secret', 'use_linksupdate', 'default_comment_status_page', 'wporg_popular_tags', 'what_to_show');
+	$unusedoptions = array ('blodotgsping_url', 'bodyterminator', 'emailtestonly', 'phoneemail_separator', 'smilies_directory', 'subjectprefix', 'use_bbcode', 'use_blodotgsping', 'use_phoneemail', 'use_quicktags', 'use_weblogsping', 'weblogs_cache_file', 'use_preview', 'use_htmltrans', 'smilies_directory', 'fileupload_allowedusers', 'use_phoneemail', 'default_post_status', 'default_post_category', 'archive_mode', 'time_difference', 'links_minadminlevel', 'links_use_adminlevels', 'links_rating_type', 'links_rating_char', 'links_rating_ignore_zero', 'links_rating_single_image', 'links_rating_image0', 'links_rating_image1', 'links_rating_image2', 'links_rating_image3', 'links_rating_image4', 'links_rating_image5', 'links_rating_image6', 'links_rating_image7', 'links_rating_image8', 'links_rating_image9', 'weblogs_cacheminutes', 'comment_allowed_tags', 'search_engine_friendly_urls', 'default_geourl_lat', 'default_geourl_lon', 'use_default_geourl', 'weblogs_xml_url', 'new_users_can_blog', '_wpnonce', '_wp_http_referer', 'Update', 'action', 'rich_editing', 'autosave_interval', 'deactivated_plugins', 'can_compress_scripts', 'page_uris', 'update_core', 'update_plugins', 'update_themes', 'doing_cron', 'random_seed', 'rss_excerpt_length', 'secret', 'use_linksupdate', 'default_comment_status_page', 'wporg_popular_tags', 'what_to_show', 'rss_language',
 	foreach ( $unusedoptions as $option )
 		delete_option($option);
 
Index: wp-admin/includes/export.php
===================================================================
--- wp-admin/includes/export.php	(revision 19762)
+++ wp-admin/includes/export.php	(working copy)
@@ -331,7 +331,7 @@
 	<link><?php bloginfo_rss( 'url' ); ?></link>
 	<description><?php bloginfo_rss( 'description' ); ?></description>
 	<pubDate><?php echo date( 'D, d M Y H:i:s +0000' ); ?></pubDate>
-	<language><?php echo get_option( 'rss_language' ); ?></language>
+	<language><?php bloginfo_rss( 'language' ); ?></language>
 	<wp:wxr_version><?php echo WXR_VERSION; ?></wp:wxr_version>
 	<wp:base_site_url><?php echo wxr_site_url(); ?></wp:base_site_url>
 	<wp:base_blog_url><?php bloginfo_rss( 'url' ); ?></wp:base_blog_url>