その種族の言語は他のどんな人間の言語にも劣らず複雑だ。の英語

The language of that tribe is as complex as any other human language.

Humans are not designed to be able to speak any language.

Man is the only creature that can speak （＝No other creature can speak）

I find it difficult to speak another language.

What is considered impolite in one language may not be considered impolite in another language.

Language as we know is a human invention.

No one speaks this language anymore.

Language is one of the most important inventions of mankind.

Language is one of man's most important inventions.

Man alone can speak

Man is the only creature that can speak.

Language is an indispensable instrument of human society.

Man alone has the gift of speech.

What would be an appropriate global lingua franca? One group's language or a constructed language?

Language changes as human beings do.

Only human beings are capable of speech.

Language is peculiar to man.

a number of languages spoken in the Caucasus that are unrelated to languages spoken elsewhere

Language is unique to man.

Language is a specifically human characteristic.

Language is a major means of communication, but communication between people who speak different languages is difficult.

Linguistics is the study of human language.

a language formed by the gradual mixing of two separate languages

Language is a vehicle of human thought.

that language has a complex system for indicating gender

It's difficult to standardize language for a multi-ethnic nation.

the inherence of polysemy in human language

Which is the most difficult language in the world?

untaught people whose verbal skills are grossly deficient

Language is the means by which people communicate with others.