Need a little explaining..

[Dominic]

@Dominic

I18N Custom Fields is an extension of Mike's Custom Fields, so it should work.

Mike's Pages plugin does not support I18N custom fields, but you can easily fix this by patching it like:
http://get-simple.info/forum/post/21170/#p21170

Patched the pages plugin per instructions, but I am getting an internal server error 500. Getting it even without the patch.

"Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@newenglanddrawings.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request."