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The period preceding, and contemporary with, the Protestant Reformation saw the translation of the Bible into local European languages—a development that contributed to Western Christianity's split into Roman Catholicism and Protestantism due to disparities between Catholic and Protestant versions of crucial words and passages (although the Protestant movement was largely based on other things, such as a perceived need for reformation of the Roman Catholic Church to eliminate corruption). Lasting effects on the religions, cultures and languages of their respective countries have been exerted by such Bible translations as Martin Luther's into German, Jakub Wujek's into Polish, and the King James Bible's translators' into English. Debate and religious schism over different translations of religious texts remain to this day, as demonstrated by, for example, the King James Only movement.

Disparities between versions of crucial words and passages in versions of the bible contributed to what split?
Roman Catholicism and Protestantism