To answer the question on why there is a completely different language for a Human based faction, I'll ask a question to that. Why does Yamatai speak a different language when they are essentially the same? My actual answer is that despite where you come from, you can be the same species and have different languages.
To get back to the main point, I will update the article page, or just turn it into the culture page. However, this goes back to you basically asking me to write a article on a language that I personally don't have much experience in speaking, let alone reading or having proper grammar. Before you state it, no, I will not change to an already preset language. However, I find it profoundly absurd if you would expect me to make a article such as the Hidden Sun Clan's Language "Takavonai."
I don't deny the information needed to describe the language, and I'm not stating that I will not update or at least pin the article into another article. Merely the point being that if the article is considered a 'Snub' as you call it. Then why is a recently updated article for Trade and Yamataigo still acceptable?