diff --git a/src/main/as/com/threerings/presents/net/Credentials_HasLanguage.as b/src/main/as/com/threerings/presents/net/Credentials_HasLanguage.as
new file mode 100644
index 000000000..906f0e71d
--- /dev/null
+++ b/src/main/as/com/threerings/presents/net/Credentials_HasLanguage.as
@@ -0,0 +1,31 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.presents.net {
+
+/**
+ * Implemented by credentials that provide a language. On the client this is just a marker
+ * interface, for now.
+ */
+public interface Credentials_HasLanguage
+{
+}
+}
diff --git a/src/main/as/com/threerings/presents/net/Credentials_HasMachineIdent.as b/src/main/as/com/threerings/presents/net/Credentials_HasMachineIdent.as
new file mode 100644
index 000000000..39a8381ac
--- /dev/null
+++ b/src/main/as/com/threerings/presents/net/Credentials_HasMachineIdent.as
@@ -0,0 +1,31 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
+// http://code.google.com/p/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.presents.net {
+
+/**
+ * Implemented by credentials that provide a machine identifier. On the client this is just a
+ * marker interface, for now.
+ */
+public interface Credentials_HasMachineIdent
+{
+}
+}