Stop using OnlyOnTheseArchitectures message.
With arbitrarily-complex Boolean expressions and pseudo-architecture identifiers, it's no longer possible to generate a list of architectures that are supported. Not to mention, some of the new identifiers include English words like "compatible" which would need to be localized.
Just use WindowsVersionNotSupported instead. End users should rely on their vendor to specify what architectures are supported, just like they already have to specify what Windows versions are supported because Setup doesn't say.