The article presents a multifaceted analysis of the dynamics of spelling and pronunciation of words of foreign origin in the Ukrainian literary language. The research expanded the range of knowledge about the phases of formation of the Ukrainian orthography, in particular, the part devoted to the orthography of foreign tokens and made it possible to explain the changes in the rules of spelling and pronunciation in diachrony. Linguistic and extralinguistic factors that influenced linguistic evolution are identified and the processes of normalization of borrowed vocabulary taking into account the historical context are highlighted. The views of Ukrainian linguists on the norms of spelling and pronunciation of words of foreign origin are generalized. It was stated that although there are few foreign words (approximately 10 percent), compared to other Ukrainian lexical collections, foreign words have provoked and are causing many discussions among linguists about their mastery of the Ukrainian literary language. After all, the legalization of the language norm, its written reflection and its organization in Ukraine is very difficult, which causes heterogeneity of spelling and pronunciation of words of foreign origin. Transformations in borrowed tokens over a long historical period are traced. A chronological description of all editions of the Ukrainian orthography is made and the most typical changes and establishments in the spelling and pronunciation of foreign words are systematized. It is proved that the lack of clearly formulated and formed rules for spelling borrowed words has led to variable spelling and pronunciation. After all, the phonetic system of the Ukrainian language can not fully reflect the peculiarities of the sound system of a foreign language, which indicates a complex process of stabilization of pronunciation and spelling norms of words of foreign origin in the Ukrainian literary language.