A language is a system of communication unique to humankind. In fact one of the most important differences between humans and animals is the ability to speak. Different people have their own languges but the function of languages is the same.
1 )
People's languages are alike all over the world.
Though languages are different, people use them for the same purpose.
3 )
Human beings have different functions that are not so different from animals.
4 )
communication by using languages is common among different creatures.
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