Czechization or Czechisation (Czech: čechizace, počeštění; German: Tschechisierung) is a cultural change in which something ethnically non-Czech is made to become Czech.
This concept is especially relevant in relation to the Germans of Bohemia, Moravia and Czech Silesia[citation needed] as well as the Poles of Trans-Olza[1] who have come under increased pressure of Czechization after the breakup of Austria-Hungary and the formation of a Czechoslovak nation state in 1919 (see Germans in Czechoslovakia (1918-1938)); to a smaller extent, it has also occurred with Slovaks and Rusyns.[citation needed]