Not necessarily. What if its a singular entity, or a hive mentality without language? What if they use a medium for communication that we do not physically possess (or even have access to via technology)?
The majority of the aliens in Star Trek always fit into the humanoid model, treating them as basic re-skinned humans with the same motivations and ideas, which is a dangerous assumption out here in the real world.
I can't imagine (maybe you can and you can comment here) that a species that can make a spaceship and cross the universe can do so without a language that we could understand.
Just to mine minerals and manufacture metal, computers, fuel, etc etc would mean co-operation on a massive scale -- millions of individuals.
Nan-bots sure, they would be talking alien wifi and machine code. Giant creatures (AIs?) that live slower than us and manufacture each component themselves without the need of help.... like spaceflight from first principles.
The majority of the aliens in Star Trek always fit into the humanoid model, treating them as basic re-skinned humans with the same motivations and ideas, which is a dangerous assumption out here in the real world.