A single word carrying the connotation or literal meaning of either, "real language" or "official language" that is roughly antonymous with the word vernacular.
To provide more context: I am seeking to use this word to describe a "real language" in the same way that English or Danish is a "real language".
The purpose being to describe a language barrier in a nontraditional sense. For example, if we take the concept of a language barrier and apply it to programming languages or any other domain specific language that already has an established vernacular or jargon associated with it. Such that an outsider to that particular domain could feel as though there is something of a language barrier between themselves and a member of that specific domain.
The end goal is that we can make make the assertion that language barriers don't necessarily apply only to languages as we define them in the form of English or Danish but also to a vernacular or jargon used within a specific domain.