 The process of slovakization was present in the Kingdom of Hungary presumably ever since the appearance of the Slovak nation itself, but up until the foundation of Czechoslovakia the process was entirely voluntary.This early form of slovakization can be observed in detail in noble families' personal correspondence.Another example of pre-World War I Slovakization is the assimilation of the Habans, a Hutterite group settled in the Nagylévárd (today's Veľké Leváre) area in the 16th century, into the Slovak majority.