Humans are not the only animals with a spoken language. A 2009 study found monkeys had a system of vocal communication that actually had a set of syntax rules, similar to human languages, setting them apart from many other animals who use sounds to communcate.

"For example, male monkeys called “boom boom” to gather other monkeys to them, but “boom boom krak-oo krak-oo” meant that a tree or branch was about to fall. Adding a “hak-oo” to that sequence turned it into a territorial warning against stray monkeys from neigboring groups. Multiple “krak-oo” calls added to an original “krak” meant not only that a leopard was in the area, but that it posed an immediate threat." (Wired)

Spoken language