Minor - updating lang vars.

main/lang/english/trad4all.inc.php

@@ -1603,4 +1603,5 @@ $DataTableSearch = "Search";
 $HideColumn = "Hide column";
 $DisplayColumn = "Show column";
 $LegalAgreementAccepted = "Legal agreement accepted";
+$SessionDurationXDaysLeft = "%s days left";
 ?>

main/lang/spanish/trad4all.inc.php

@@ -2,6 +2,9 @@
 /*
 for more information: see languages.txt in the lang folder.
 */
+$CheckUniqueEmail = "Verificar que los correos sean únicos.";
+$EmailUsedTwice = "El correo electrónico ya esta registrado en el sistema.";
+$UserXSessionY = "Usuario: %s - Sesión: %s";
 $NextTopic = "Próximo tema";
 $CurrentTopic = "Tema actual";
 $ShowFullCourseAdvance = "Ver programación";