Language
Language is a system that consists of the development, acquisition, maintenance and use of complex systems of communication, particularly the human ability to do so; and a language is any specific example of such a system.
Literature
Literature, most generically, is any body of written works. More restrictively, literature writing is considered to be an art form, or any single writing deemed to have artistic or intellectual value, often due to deploying language in ways that differ from ordinary usage.
Russian
Russian refers to anything related to Russia, including:
Language
He has strangled
His language in his tears.
William Shakespeare, Henry VIII (c. 1613), Act V, scene 1, line 158.
Language
The limits of my language mean the limits of my world.
Ludwig Wittgenstein Tractatus Logico-Philosophicus (5.6)
Language
Well languag'd Danyel.
William Browne, Britannia's Pastorals, Book II. Song 2, line 303.
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