First off, this is just a user-to-user technical support forum. No one who has any say in this matter visits or sees the posts made here.
With that understanding, from the
Church News,
“Mormon” is correctly used in proper names such as the Book of Mormon or when used as an adjective in such historical expressions as “Mormon Trail.”
So, it's possible that the name of the Tabernacle Choir is acceptable. However, there is that part "Additional information about this important matter will be made available in the coming months." So, I wouldn't count out a change to the "MTC".
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