First, I am talking about generating text. In software. Translators would really only need to check the text so that it's correct, and when it isn't, they should submit bug requests so that the programmers implementing the language back-end can fix them.

Second, an AST is nothing but the result of applying grammar to some input, something which translators are very familiar with (probably more than programmers). It is utterly trivial to teach a translator a new textual representation of what they already know.

It's a tree of nodes connected by arrows. They learned the parsing stage in school. At least here in my country, everybody is required to decompose a phrase in it's underlying grammatical constituents in the eight grade. You just never draw it as a tree, but it's trivial to learn to draw it as a tree and read it from a tree.