diff --git a/course/scales.php b/course/scales.php
index 9e173ba16eb..babed320937 100644
--- a/course/scales.php
+++ b/course/scales.php
@@ -438,17 +438,17 @@
             $buttons = "";
             if (empty($scales_uses) && ($incustom || has_capability('moodle/course:managescales', get_context_instance(CONTEXT_SYSTEM, SITEID)))) {
                 $buttons .= "<a title=\"$stredit\" href=\"$path/scales.php?id=$course->id&amp;scaleid=$scale->id&amp;action=edit\"><img".
-                            " src=\"$CFG->pixpath/t/edit.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                            " src=\"$CFG->pixpath/t/edit.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"$stredit\" /></a> ";
                 if ($incustom && has_capability('moodle/course:managescales', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
                     $buttons .= "<a title=\"$strdown\" href=\"$path/scales.php?id=$course->id&amp;scaleid=$scale->id&amp;action=down&amp;sesskey=$USER->sesskey\"><img".
-                                " src=\"$CFG->pixpath/t/down.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                                " src=\"$CFG->pixpath/t/down.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"$strdown\" /></a> ";
                 }
                 if (!$incustom && has_capability('moodle/course:managescales', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
                     $buttons .= "<a title=\"$strup\" href=\"$path/scales.php?id=$course->id&amp;scaleid=$scale->id&amp;action=up&amp;sesskey=$USER->sesskey\"><img".
-                                " src=\"$CFG->pixpath/t/up.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                                " src=\"$CFG->pixpath/t/up.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"$strup\" /></a> ";
                 }
                 $buttons .= "<a title=\"$strdelete\" href=\"$path/scales.php?id=$course->id&amp;scaleid=$scale->id&amp;action=delete&amp;sesskey=$USER->sesskey\"><img".
-                            " src=\"$CFG->pixpath/t/delete.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                            " src=\"$CFG->pixpath/t/delete.gif\" hspace=\"2\" height=\"11\" width=\"11\" border=\"0\" alt=\"$strdelete\" /></a> ";
             }
             $line[] = $buttons;