diff --git a/htdocs/translate.class.php b/htdocs/core/translate.class.php
similarity index 100%
rename from htdocs/translate.class.php
rename to htdocs/core/translate.class.php
diff --git a/htdocs/install/inc.php b/htdocs/install/inc.php
index 7a061d2ef7b..7d651ed1168 100644
--- a/htdocs/install/inc.php
+++ b/htdocs/install/inc.php
@@ -27,7 +27,7 @@
 
 define('DOL_VERSION','2.9.0-dev');	// Also defined in htdocs/master.inc.php
 
-require_once('../translate.class.php');
+require_once('../core/translate.class.php');
 require_once('../lib/functions.lib.php');
 require_once('../lib/admin.lib.php');
 require_once('../lib/files.lib.php');
diff --git a/htdocs/lib/functions.lib.php b/htdocs/lib/functions.lib.php
index cf723785b81..be8b4bb5339 100644
--- a/htdocs/lib/functions.lib.php
+++ b/htdocs/lib/functions.lib.php
@@ -1793,7 +1793,7 @@ function accessforbidden($message='',$printheader=1,$printfooter=1,$showonlymess
 	global $conf, $db, $user, $langs;
 	if (! is_object($langs))
 	{
-		include_once(DOL_DOCUMENT_ROOT.'/translate.class.php');
+		include_once(DOL_DOCUMENT_ROOT.'/core/translate.class.php');
 		$langs=new Translate('',$conf);
 	}
 
@@ -1849,7 +1849,7 @@ function dol_print_error($db='',$error='')
 	// Si erreur intervenue avant chargement langue
 	if (! $langs)
 	{
-		require_once(DOL_DOCUMENT_ROOT ."/translate.class.php");
+		require_once(DOL_DOCUMENT_ROOT ."/core/translate.class.php");
 		$langs = new Translate("", $conf);
 		$langs->load("main");
 	}
diff --git a/htdocs/master.inc.php b/htdocs/master.inc.php
index ff0c528ab34..5a2581e8088 100644
--- a/htdocs/master.inc.php
+++ b/htdocs/master.inc.php
@@ -216,7 +216,7 @@ if (isset($_SERVER["HTTP_USER_AGENT"]))
 
 // Chargement des includes principaux de librairies communes
 if (! defined('NOREQUIREUSER')) require_once(DOL_DOCUMENT_ROOT ."/user/user.class.php");		// Need 500ko memory
-if (! defined('NOREQUIRETRAN')) require_once(DOL_DOCUMENT_ROOT ."/translate.class.php");
+if (! defined('NOREQUIRETRAN')) require_once(DOL_DOCUMENT_ROOT ."/core/translate.class.php");
 if (! defined('NOREQUIRESOC'))  require_once(DOL_DOCUMENT_ROOT ."/societe/societe.class.php");
 if (! defined('NOREQUIREDB'))   require_once(DOL_DOCUMENT_ROOT ."/lib/databases/".$conf->db->type.".lib.php");
 
diff --git a/htdocs/support/inc.php b/htdocs/support/inc.php
index b5a280b4a0b..bcb45637655 100644
--- a/htdocs/support/inc.php
+++ b/htdocs/support/inc.php
@@ -27,7 +27,7 @@
 
 define('DOL_VERSION','2.5-dev');	// Also defined in htdocs/master.inc.php
 
-require_once('../translate.class.php');
+require_once('../core/translate.class.php');
 require_once('../lib/functions.lib.php');
 require_once('../lib/admin.lib.php');