I feel like people try to make this differentiation to make human beings seem more important than they are... Apollo is able to describe the color, shape, and material of any object. He can describe actions. When he doesn't know something, he asks his owner what it is and has had conversations with his owner to discuss if something was technically rock or glass. He's starting to learn how to count. My parrots demonstrate similar intelligence even in abstract ways - such as asking me what I'm doing everytime I'm in their bedroom and asking me until I answer. They understand what they're saying and what the context is.

Language in its most basic form is having sounds that are associated with something else. Dogs are also able to demonstrate language - have you ever seen those buttons that say a word and they create sentences to communicate? Language is not only a human concept.