But they do have a pr department. The holy see is a political organization. They are an internationally recognized government with diplomatic relationships. While not a member state of the UN they are permanent observers and influence decision making on a worldwide scale, and it's not a secret that the church, which is run by the same person as the holy see (the Pope) has had its fair share of controversy.
I don't think it's a stretch to think the holy see spends time and effort in order to make their appearance, and the appearance of the church, look better.
I actually don't think this is the case, since it's just emulating actual behavior. In this case, real humans are talking like that, so if the AI adopts that in its training data, it's not nonsensical.
It's not really different from new slang getting passed in as training data and the AI using it.