We do have terrestrial aliens here on Earth and we are trying to chat with them. Dolphins, Gorillas, Chimps, Bonobos, Crows, Killer Whales... there is evidence for all of these species having varying degrees of language, culture, problem solving capabilities. Some of them, like Dolphins, sure seem damned close to our own capabilities with likely fully formed languages. We've been trying to decipher their language for 50 years with almost no success. With many of these species we've figured out pretty rudimentary and simplistic communication modes, but they clearly have much more complex communication structures among themselves and we've come nowhere close to deciphering them.
That alone tells you how difficult it's going to be to learn to talk with extraterrestrial aliens. Even our near cousins, we struggle to communicate with.
If we're examining our behavior as an analogy for the ET's however, it would suggest that either no one's around, or those who are around are so advanced that they don't think we're worth the effort to communicate with. Because we're definitely trying to communicate with the species we're aware of that we think have language.
Of course, many of the species on that list were only added relatively recently (Crows, for example).