fixed I18n->translate(), username validation

core/app/auth/Authenticator.php

@@ -396,6 +396,8 @@
 			if (!Config::ENABLE_USER_REGISTRATION || !$registration_enabled)
 				return static::ERR_REGISTER_DISABLED;
 
+			$username = preg_replace("/\\W/", "_", strtolower($username));
+
 			// Check that user doesn't exist
 			$user = $this->app->assets->getBySlug(
 				"\\Crispage\\Assets\\User", $username

core/app/text/I18n.php

@@ -124,7 +124,7 @@
 			$num = preg_match_all(self::TS_REGEX, $str, $matches, PREG_OFFSET_CAPTURE);
 
 			// If no keys, return the input
-			if (!$num) return $str;
+			if (!$num) return (empty($vars)) ? $str : sprintf($str, ...$vars);
 
 			// Initialize position and output variables
 			$pos = 0;