Chimpanzees cannot speak because, unlike humans, their vocal cords are located higher in their throats and cannot be controlled as well as human vocal cords. It does not follow from their lack of speech, however, that chimpanzees are incapable of language, that is, a human-like grammar.
Interestingly, birds can talk!
Or at least immitate noises of all kinds, includes words that humans repeat to them.
"Parrots, however, are not the only birds that learn by imitation. Indian mynah birds are also famed for their imitative capabilities, and in the U.S., northern mockingbirds sing repeated phrases with bits of calls appropriated from blue jays, robins, cardinals and other birds"
This is worth starting an entirely new thread about mimicking birds. I had several parakeets in my life time with some funny stories.