Index: src/wp-admin/includes/ms.php
===================================================================
--- src/wp-admin/includes/ms.php	(revision 32380)
+++ src/wp-admin/includes/ms.php	(working copy)
@@ -253,6 +253,7 @@
 	);
 	update_option( 'adminhash', $new_admin_email );
 
+	/* translators: Do not translate the ALL CAPS words between ### - those are placeholders. */
 	$email_text = __( 'Howdy ###USERNAME###,
 
 You recently requested to have the administration email address on
@@ -334,6 +335,7 @@
 				);
 		update_option( $current_user->ID . '_new_email', $new_user_email );
 
+		/* translators: Do not translate the ALL CAPS words between ### - those are placeholders. */
 		$email_text = __( 'Howdy ###USERNAME###,
 
 You recently requested to have the email address on your account changed.
Index: src/wp-admin/includes/schema.php
===================================================================
--- src/wp-admin/includes/schema.php	(revision 32380)
+++ src/wp-admin/includes/schema.php	(working copy)
@@ -917,6 +917,7 @@
 		$site_admins = get_site_option( 'site_admins' );
 	}
 
+    /* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */
 	$welcome_email = __( 'Howdy USERNAME,
 
 Your new SITE_NAME site has been successfully set up at:
Index: src/wp-admin/ms-delete-site.php
===================================================================
--- src/wp-admin/ms-delete-site.php	(revision 32380)
+++ src/wp-admin/ms-delete-site.php	(working copy)
@@ -42,6 +42,7 @@
 
 	$url_delete = esc_url( admin_url( 'ms-delete-site.php?h=' . $hash ) );
 
+	/* translators: Do not translate the ALL CAPS words between ### - those are placeholders. */
 	$content = __( "Howdy ###USERNAME###,
 
 You recently clicked the 'Delete Site' link on your site and filled in a
Index: src/wp-includes/ms-functions.php
===================================================================
--- src/wp-includes/ms-functions.php	(revision 32380)
+++ src/wp-includes/ms-functions.php	(working copy)
@@ -1433,7 +1433,9 @@
 		return false;
 
 	$welcome_email = get_site_option( 'welcome_email' );
-	if ( $welcome_email == false )
+	if ( $welcome_email == false ) {
+
+		/* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */
 		$welcome_email = __( 'Howdy USERNAME,
 
 Your new SITE_NAME site has been successfully set up at:
@@ -1448,6 +1450,7 @@
 We hope you enjoy your new site. Thanks!
 
 --The Team @ SITE_NAME' );
+	}
 
 	$url = get_blogaddress_by_id($blog_id);
 	$user = get_userdata( $user_id );
@@ -2080,6 +2083,8 @@
 function welcome_user_msg_filter( $text ) {
 	if ( !$text ) {
 		remove_filter( 'site_option_welcome_user_email', 'welcome_user_msg_filter' );
+
+		/* translators: Do not translate USERNAME, SITE_NAME, PASSWORD, LOGINLINK: those are placeholders. */
 		$text = __( 'Howdy USERNAME,
 
 Your new account is set up.