invite signup check code's owner

resources/lang/en/invite.php

@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'invalid_inviter' => 'Invalid inviter! The invite code is banned!',
+];

resources/lang/en/nexus.php

@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'invalid_argument' => 'Invalid argument',
+];