Cyril and Methodius were convinced that the various peoples could not consider that they had fully received Revelation until they had heard it in their own language and read it with the characters proper to their own alphabet.
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Cyril and Methodius are a classic example of what is today referred to with the term "inculturation": Each people should make the revealed message penetrate into their own culture, and express the salvific truth with their own language. This implies a very exacting work of "translation," as it requires finding adequate terms to propose anew the richness of the revealed Word, without betraying it. The two brother saints have left in this sense a particularly significant testimony that the Church continues looking at today to be inspired and guided.
Benedict XVI
Address for the Wednesday General Audience, June 18, 2009