Question: During periods of time, this acquistion or imposition of elements of Polish culture, such as the language, under populations of territories controlled, or under the influence of Poland; Jan Kazimierz Chodkiewicz, a Lithuanian nobleman, is a prime example of this act - what is it called? 
Sentence (from "Roman Dmowski"): He favored the re-establishment of Polish independence by nonviolent means, and supported policies favorable to the Polish middle class.
Relevant evidence: No