In Part 95, Section D, encryption is not mentioned.
But the Emission Types are limited, digital emissions are not allowed. (AM and SSB) are specified.)
In theory, you could have a transmission header / trailer in Esperanto that would route the message, and then the message traffic. But that sounds like a hill that wouldn't be worth the climb.
Indeed, only plain language voice communications are allowed.
§ 95.931 Permissible CBRS uses.
The operator of a CBRS station may use that station to transmit two-way plain language voice communications to other CBRS stations and to other stations that are authorized to transmit on CBRS frequencies.
But the Emission Types are limited, digital emissions are not allowed. (AM and SSB) are specified.)
In theory, you could have a transmission header / trailer in Esperanto that would route the message, and then the message traffic. But that sounds like a hill that wouldn't be worth the climb.