yeah i wouldn't even call it humanization, they are intergalactic intelligent humanoid alien tribal hunters with technology we can only dream of, why wouldn't they have complex conversations with one another, and have intelligence, they have their own language, they have always been somewhat reminiscent to human beings from day one. here is the list............
They are technologically advanced- we are technologically advanced.
They have their own language - we have our own languages.
They are hunters- we are hunters.
They are humanoid- we are humanoid.
They have culture, codes and practices- we have culture codes and practices.
They are tribal- we are tribal.
They grieve- we grieve (end of predator 2 anyone?)
They even have humor- we have humor
My point here, is predator has always had an element of humanization, the fact the very first predator was talking english should be telling people that.
I really do not see how understanding the way they communicate with each other is taking away from what they are.
They will always be aliens, its just they share a lot of common ground with us humans, i always assumed this is why we are their chosen ultimate prey.