Index: src/wp-includes/formatting.php
===================================================================
--- src/wp-includes/formatting.php	(revision 37690)
+++ src/wp-includes/formatting.php	(working copy)
@@ -1687,6 +1687,8 @@
 			$chars[ chr(195).chr(184) ] = 'oe';
 			$chars[ chr(195).chr(133) ] = 'Aa';
 			$chars[ chr(195).chr(165) ] = 'aa';
+		} elseif ( 'ca' === $locale ) {
+			$chars[ chr(108).chr(194).chr(183).chr(108) ] = 'll';
 		}
 
 		$string = strtr($string, $chars);