The paper is devoted to the increasing tendency for some lexical groups of Russian nouns to be used non-declined. The starting point of the tendency were some exotic toponyms, antropomyms and the names of fashionable western stuff ending at u, i, o, e, stressed a. The tendency has become conventional at the XX century and let the new waves of loan words be grammatically unarranged. It had presumably the influence upon typically Russian toponyms, ending at -ovo, -evo, -ino, -yno and some family names to be used non-declined. The question is bound to arise, if this is one more step to transfer Russian language to analytic languages, or Russian language would press the tendency.