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Etymology
From.

Suffix

 * 1) Forms names of languages when appended to roots denoting names of nations or regions:
 * — the Russian language
 * 1) Forms adverbs with the meaning of a language:
 * — in Russian
 * գրել ռուսերեն (grel ṙuseren) — to write in Russian
 * 1) Forms adjectives with the meaning of a language:
 * — in Russian
 * ռուսերեն բառ (ṙuseren baṙ) — Russian word