Some info about RUSSIAN
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The Gulag[c][d][10][11][9] was the government agency in charge of the Soviet network of forced labour camps which were set up by order of Vladimir Lenin, reaching its peak during Joseph Stalin's rule from the 1930s to the early 1950s.[12] English-language speakers also use the word gulag in reference to each of the forced-labor camps that existed in the Soviet Union, including the camps that existed in the post-Lenin era.[13][14] The full official name of the agency changed several times. <
Wikipedia contributors, "Gulag," Wikipedia, The Free Encyclopedia,
ABOUT THE RUSSIAN LANGUAGE