Actually, humans are unique. We have the capacity to creatively use language and reason. Something I have never seen in a primate.
Then you have never looked or are simply repeating a falsehood.
Here is a list of over 70,000 scholarly articles on primate use of language.
And
here is a list of over 40,000 scholarly articles on primate reasoning and cooperation.
But you also should remember that humans ARE just another primate, just another chordate, just another animal. Every critter is unique, there is nothing unique about being unique.
Anyone so limited that they can only spell a word one way is severely handicapped!