I have noticed that when alien races and their languages are mentioned, it goes like this.
Klingons speak Klingon.
Romulans speak Romulan.
Vulcans speak Vulcan.
On Earth we have a few thousand languages, so why has Star Trek never looked more into the languages of other worlds? Surely, they have as many languages as we do, maybe more. A passing mention would even be in order, right?