I wonder how effective that might be as a language-learning tool. Imagine a popular novel in the US market, maybe 80000-100000 words long but whose vocabulary consists of only a few thousand unique words. The first few pages are in English, but as you progress through the book, more and more of the words appear in Chinese or German or whatever the target language is. By the end of the book you are reading the second language, having absorbed it more or less through osmosis.

Someone who reads A Clockwork Orange will unavoidably pick up a few words of vaguely-Russian extraction by the end of it, so maybe it's possible to take advantage of that. The main problem I can see is that the new language's sentence grammar will also have to be blended in, and that won't go as smoothly.