diff --git a/app/Util/Lexer/RestrictedNames.php b/app/Util/Lexer/RestrictedNames.php
new file mode 100644
index 000000000..44c431332
--- /dev/null
+++ b/app/Util/Lexer/RestrictedNames.php
@@ -0,0 +1,129 @@
+<?php
+
+namespace App\Util\Lexer;
+
+class RestrictedNames {
+
+  static $restricted = [
+     "about",
+     "abuse",
+     "admin",
+     "administrator",
+     "app",
+     "autoconfig",
+     "blog",
+     "broadcasthost",
+     "community",
+     "contact",
+     "contact-us",
+     "contact_us",
+     "copyright",
+     "css",
+     "d",
+     "dashboard",
+     "dev",
+     "developer",
+     "developers",
+     "doc",
+     "docs",
+     "download",
+     "domainadmin",
+     "domainadministrator",
+     "email",
+     "errors",
+     "events",
+     "example",
+     "faq",
+     "faqs",
+     "features",
+     "federation",
+     "fediverse",
+     "ftp",
+     "guest",
+     "guests",
+     "help",
+     "hostmaster",
+     "hostmaster",
+     "i",
+     "image",
+     "images",
+     "imap",
+     "img",
+     "info",
+     "info",
+     "is",
+     "isatap",
+     "it",
+     "js",
+     "localdomain",
+     "localhost",
+     "login",
+     "logout",
+     "mail",
+     "mailer-daemon",
+     "mailerdaemon",
+     "marketing",
+     "me",
+     "media",
+     "mis",
+     "mx",
+     "new",
+     "news",
+     "news",
+     "no-reply",
+     "nobody",
+     "noc",
+     "noreply",
+     "ns0",
+     "ns1",
+     "ns2",
+     "ns3",
+     "ns4",
+     "ns5",
+     "ns6",
+     "ns7",
+     "ns8",
+     "ns9",
+     "owner",
+     "pixelfed",
+     "pixelfed-support",
+     "pixelfed_support",
+     "pop",
+     "pop3",
+     "postmaster",
+     "pricing",
+     "privacy",
+     "root",
+     "sales",
+     "security",
+     "signin",
+     "signout",
+     "smtp",
+     "src",
+     "ssladmin",
+     "ssladministrator",
+     "sslwebmaster",
+     "status",
+     "support",
+     "support",
+     "sys",
+     "sysadmin",
+     "system",
+     "terms",
+     "tutorial",
+     "tutorials",
+     "usenet",
+     "user",
+     "users",
+     "uucp",
+     "webmaster",
+     "wpad",
+     "www"
+   ];
+
+  public static function get()
+  {
+    return self::$restricted;
+  }
+
+}
\ No newline at end of file