True MOH sourced from CUCM is bound to the CTI Port Group. So unless you want to create a CTI Port Group for every MOH stream you have, I would just suggest abandoning this method, and instead replace your step sequences of: Call Hold, Delay, Call Unhold, with a single Play Prompt step which plays the MOH audio file to the customer. If you go this route, then you'll want to make sure that your Network MOH on the CTI Port Group is language neutral. I.e., Use the sample audio file. The Network Hold will be used during transfers out of UCCX, such as those to Agent phones.
As for how to handle that with multilingual Contact Center, well, there's several choices. The method you choose is largely dependent on how you're handling other aspects of this solution. E.g., Sending the caller to the correct language for menu selections, prompts, and queues.
Anthony Holloway
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