Please add support for IDN Domains via the Resellerclub Domain Registrar module. If a customer attempts to order a domain with a foreign character in it, WHMCS converts it or the registration fails altogether.
Example: Ã± is converted to n and the domain is no longer an IDN domain name. a chinese or japanese character causes the domain registration to fail completely.
I'm pleased to advise this is now possible. I've tested in v6.3 and can confirm that the characters are passed to ResellerClub as entered by the customer. I made a registration attempt for teñsting.org, and this was the data passed to ResellerClub's API:
In order for this to work you also need to pass the idnLanguageCode variable, so I've added instructions for doing that to our documentation: http://docs.whmcs.com/ResellerClub#IDN_Configuration