Fix: Avoid to load language when we can not.

htdocs/core/class/translate.class.php

@@ -197,6 +197,12 @@ class Translate
 		if ($alt < 1 && isset($langarray[1]) && strtolower($langarray[0]) == strtolower($langarray[1])) $alt=1;
 		if ($alt < 2 && strtolower($langofdir) == 'en_us') $alt=2;
 
+		if (empty($langofdir))	// This may occurs when load is called without setting the language and without providing a value for forcelangdir
+		{
+			dol_syslog("Error: ".get_class($this)."::Load was called but language was not set yet with langs->setDefaultLang(). Nothing will be loaded.", LOG_WARNING);
+			return -1;
+		}
+
 		foreach($this->dir as $keydir => $searchdir)
 		{
 			// Directory of translation files

htdocs/societe/class/societe.class.php

@@ -2811,7 +2811,7 @@ class Societe extends CommonObject
     		}
     		else                    // For backward compatibility
     		{
-    			dol_syslog("Your country setup use an old syntax. Reedit it using setup area.", LOG_WARNING);
+    			dol_syslog("Your country setup use an old syntax. Reedit it using setup area.", LOG_ERR);
     			include_once DOL_DOCUMENT_ROOT.'/core/lib/company.lib.php';
     			$country_code=getCountry($country_id,2,$this->db);  // This need a SQL request, but it's the old feature that should not be used anymore
     			$country_label=getCountry($country_id,0,$this->db);  // This need a SQL request, but it's the old feature that should not be used anymore