Article: Until the 20th century, the language's spoken form was the language of only the upper noble classes and urban population, as Russian peasants from the countryside continued to speak in their own dialects. By the mid-20th century, such dialects were forced out with the introduction of the compulsory education system that was established by the Soviet government. Despite the formalization of Standard Russian, some nonstandard dialectal features (such as fricative [ɣ] in Southern Russian dialects) are still observed in colloquial speech.

Question: When did the Soviets establish required education?
the mid-20th century
Artikel: Fram till 1900-talet var språkets talade form språket för endast de övre adelsklasserna och stadsbefolkningen, då ryska bönder från landsbygden fortsatte att tala i egna dialekter. Vid mitten av 1900-talet tvingades sådana dialekter ut i och med införandet av det obligatoriska utbildningssystem som etablerades av sovjetregeringen. Trots formaliseringen av standardryska observeras fortfarande vissa icke-standarddialektala drag (som frikativa [<unk>] i sydryska dialekter) i kollokvialt tal. Fråga: När upprättade Sovjet krav på utbildning?
Article: Until the 20th century, the spoken form of language was the language of only the upper nobility classes and urban population, as Russian peasants from the countryside continued to speak in their own dialects. By the mid-20th century, such dialects were forced out with the introduction of the compulsory education system established by the Soviet government. Despite the formalization of standard Russian, some non-standard dialectal features (as fricative [<unk>] in South Russian dialects) are still observed in colloquial numbers. Question: When did the Soviets establish demands for education?
mitten av 1900-talet
mid-20th century