 The Soviet propaganda @-@ motivated support for Polish @-@ language cultural activities , however , clashed with the official policy of <unk> . The Soviets at first intended to phase out the Polish language and so banned Polish from schools , street signs , and other aspects of life . This policy was , however , reversed at times — first before the elections in October 1939 ; and later , after the German conquest of France . In November 1940 , the Poles of Lwów observed the 85th anniversary of Adam Mickiewicz 's death . Soon , however , Stalin decided to re @-@ implement the <unk> policies . He reversed his decision again , however , when a need arose for Polish @-@ language pro @-@ Soviet propaganda following the German invasion of the Soviet Union ; as a result Stalin permitted the creation of Polish forces in the East and later decided to create a Communist People 's Republic of Poland . 
