Bilingual literary creativity: language shift or code-switching?

The writing of texts in more than one language by the same author referred to as a literary creation has a long history. It can be both the original com- position and a self-translation by the author with a certain degree of revision of the initial text. The purpose of this article is to consider some cases of author's bilingualism / polylingualism and analyze its varieties. The material for the research includes literary creations of a number of authors who lived in different historical periods (Joseph Flavius, Ulrich von Hutten, Oscar Wilde, Vladimir Nabokov, Joseph Brodsky, Yevgeny Yevtushenko, Sholom Aleichem, etc.). Usually, in cases where the author uses two / more languages, the opposition of a native language / the second (third, etc.) language is observed. There is also a particular issue of treating the possibility of having more than one native language. In gen- eral, in such cases we deal with colloquial / modern languages used by corresponding communities as means of communication. However, there are also situations where one member of a bilingual pair is a language of the culture (Latin and new languages at the Renaissance, Yiddish and Hebrew among a number of Jewish authors, etc.). In any case, the question may arise as to how balanced this kind of bilingual creativity is. Using the categories of socio- linguistics, this issue can be formulated as follows: has the writer retained the code-switching (if yes, then what is the relative importance of both lan- guages in his creative activity) and has it not resulted in a language shift, that is, an almost complete tran- sition to one of the members of the bilingual pair.