diff --git a/htdocs/core/class/translate.class.php b/htdocs/core/class/translate.class.php
index 4202191b39a..7655d6033d9 100644
--- a/htdocs/core/class/translate.class.php
+++ b/htdocs/core/class/translate.class.php
@@ -623,8 +623,8 @@ class Translate
 			// We replace some HTML tags by __xx__ to avoid having them encoded by htmlentities because
 			// we want to keep '"' '<b>' '</b>' '<strong' '</strong>' '<a ' '</a>' '<br>' '< ' '<span' '</span>' that are reliable HTML tags inside translation strings.
 			$str = str_replace(
-				array('"', '<b>', '</b>', '<center>', '</center>', '<strong>', '</strong>', '<a ', '</a>', '<br>', '<span', '</span>', '< ', '>'), // We accept '< ' but not '<'. We can accept however '>'
-				array('__quot__', '__tagbold__', '__tagboldend__', '__tagcenter__', '__tagcenterend__', '__tagbold__', '__tagboldend__', '__taga__', '__tagaend__', '__tagbr__', '__tagspan__', '__tagspanend__', '__lt__', '__gt__'),
+				array('"', '<b>', '</b>', '<u>', '</u>', '<i>', '</i>', '<center>', '</center>', '<strong>', '</strong>', '<a ', '</a>', '<br>', '<span', '</span>', '< ', '>'), // We accept '< ' but not '<'. We can accept however '>'
+				array('__quot__', '__tagb__', '__tagbend__', '__tagu__', '__taguend__', '__tagi__', '__tagiend__', '__tagcenter__', '__tagcenterend__', '__tagb__', '__tagbend__', '__taga__', '__tagaend__', '__tagbr__', '__tagspan__', '__tagspanend__', '__lt__', '__gt__'),
 				$str
 			);
 
@@ -638,8 +638,8 @@ class Translate
 
 			// Restore reliable HTML tags into original translation string
 			$str = str_replace(
-				array('__quot__', '__tagbold__', '__tagboldend__', '__tagcenter__', '__tagcenterend__', '__taga__', '__tagaend__', '__tagbr__', '__tagspan__', '__tagspanend__', '__lt__', '__gt__'),
-				array('"', '<b>', '</b>', '<center>', '</center>', '<a ', '</a>', '<br>', '<span', '</span>', '< ', '> '),
+				array('__quot__', '__tagb__', '__tagbend__', '__tagu__', '__taguend__', '__tagi__', '__tagiend__', '__tagcenter__', '__tagcenterend__', '__taga__', '__tagaend__', '__tagbr__', '__tagspan__', '__tagspanend__', '__lt__', '__gt__'),
+				array('"', '<b>', '</b>', '<u>', '</u>', '<i>', '</i>', '<center>', '</center>', '<a ', '</a>', '<br>', '<span', '</span>', '< ', '> '),
 				$str
 			);