As soon as everything was over, the couple immediately sent a report back to Alterra via the Post Office.
Of course, they sent the letter to Alterra in code, and it even had a few detours.
All supervisory and above positions were taught these codes under oath, which was a mix of Xeno and Terran language, but with differing meanings only they knew.
It was extremely difficult to decipher, even if code experts were to find them.
This was created primarily with the help of trusted linguistic experts (also under oath) like Renya. To create a completely undecipherable code with two languages, they created unique conversion rules.
For instance, the usage of Terran nouns as Xenoan verbs. They also incorporated some phonetic substitutions, and so on.