The animal that can dislike every moment To indulge this tangent- I still think there is a difference in the language-use/function in a human vs. animal. Generally we are using it to communicate to others AND self-talk ideas/concepts. Birds can maybe communicate about surroundings, mating, territory, etc. A lot of it is involuntary. Even primates, if forced in research situations, can communicate maybe a couple hundred words, but with no syntax, and again, not very natural. None of this adds up to the kind of language abilities humans have. I wouldn't even call what other animals have language proper, per se, but a communication system. But, I don't care about the exact definition as much as how it functions. Just on a cursory search, what I'm getting at is something like this: — schopenhauer1
Firstly, I'd like to point out that if your OP was a thesis which you were publicly defending, you'd be expected to be able to provide arguments that strengthen the initial premises and give good arguments as to why they aren't false. So I don't think it's a tangent, your initial claims must be scrutinised in order for us to really communicate. I could make an attempt to engage with what followed these initial premises by assuming them to be true for the sake of the argument, but then I'd be forced to be insincere and dishonest with you.
Secondly, I'd say that fundamentally human language is still just a communication system and there are arguments to be made about whether or not we are engaging in this voluntarily or involuntarily. Apes can also learn sign language. There is also something to be said about cognitive abilities to process language the way we do vs biological ability to speak. Some humans are born mute, most animals literally don't have the vocal chords to do what we do. Knowing whether or not thought processes are taking place in the minds of others is different to knowing whether or not an animal can physically talk.
Going back to whales, without knowing the meaning behind whale song, there isn't much we can be sure of when trying to answer the question, do whales have language? You may be right in that they are only communicating about basic biological functions, eating, mating etc, but for all we know, they are having deep philosophical communication about the nature of their individual and collective existence like we do.
The animal kingdom is full of different communication styles and some might not even be something we can perceive. Our ears might not be able to pick up certain frequencies, our noses can't tell the difference between individual rodents, our eyes can miss non-verbal communication and we to use non-verbal communication. (Which lets be honest is probably one of the reasons why so many misunderstandings arise between individuals when communicating purely in written formats.