-// 'error.mail_send' => 'error sending mail',
-// 'error.no_email' => 'no email associated with this login',
-// 'error.uncompleted_exists' => 'uncompleted entry already exists. close or delete it.',
-// 'error.goto_uncompleted' => 'go to uncompleted entry.',
+// 'error.mail_send' => 'Error sending mail.',
+// 'error.no_email' => 'No email associated with this login.',
+// 'error.uncompleted_exists' => 'Uncompleted entry already exists. Close or delete it.',
+// 'error.goto_uncompleted' => 'Go to uncompleted entry.',
+// 'error.overlap' => 'Time interval overlaps with existing records.',
+// 'error.future_date' => 'Date is in future.',
+
+// Labels for buttons.
+'button.login' => 'Bejelentkezés',
+'button.now' => 'Most',
+'button.save' => 'Mentés',
+// TODO: translate the following.
+// 'button.copy' => 'Copy',
+'button.cancel' => 'Vissza',
+
+
+
+// TODO: refactoring ongoing down from here.