Index: src/wp-includes/category-template.php
===================================================================
--- src/wp-includes/category-template.php	(revisione 37195)
+++ src/wp-includes/category-template.php	(copia locale)
@@ -502,6 +502,7 @@
  *     @type string       $feed_type             Feed type. Used to build feed link. See {@link get_term_feed_link()}.
  *                                               Default empty string (default feed).
  *     @type string       $feed_image            URL of an image to use for the feed link. Default empty string.
+ *     @type string       $feed_title            Text to use in case of missing title for the feed. Default 'Feed for all posts filed under %s'.
  *     @type int          $child_of              Term ID to retrieve child terms of. See {@link get_terms()}. Default 0.
  *     @type array|string $exclude               Array or comma/space-separated string of term IDs to exclude.
  *                                               If `$hierarchical` is true, descendants of `$exclude` terms will also
@@ -535,6 +536,7 @@
 		'feed'                => '',
 		'feed_image'          => '',
 		'feed_type'           => '',
+		'feed_title'          => __( 'Feed for all posts filed under %s' ), 
 		'hide_empty'          => 1,
 		'hide_title_if_empty' => false,
 		'hierarchical'        => true,
Index: src/wp-includes/class-walker-category.php
===================================================================
--- src/wp-includes/class-walker-category.php	(revisione 37195)
+++ src/wp-includes/class-walker-category.php	(copia locale)
@@ -134,7 +134,7 @@
 			$link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $args['feed_type'] ) ) . '"';
 
 			if ( empty( $args['feed'] ) ) {
-				$alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
+				$alt = ' alt="' . sprintf( $args['feed_title'], $cat_name ) . '"';
 			} else {
 				$alt = ' alt="' . $args['feed'] . '"';
 				$name = $args['feed'];