Cache-Swifty and Speech-Swift are interfaces to the Cepstral C library, libswift. This library is a third-party proprietary product, only available with the purchase of the Cepstral SDK and appropriate licensing for redistribution. Without either a licensed binary version, or the source code to build the library, it’s not possible to build the Perl interfaces to the C library.
The modules are also 12 years old since their last update. It’s possible that they need to be updated to work with Perl 5.26 and higher, since many C modules did.