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Hmm... Well, then, at least the texts. Scripted scenes aren't as important, and as far as I can see, the voice acting is only in Russian there.
I don't understand the game's software architecture very well, but if the files 'texts.pak' and 'p0-texts.pak' are the ones that contain all the text in the game, then perhaps replacing them with English versions is what I need. Each of them is about 4.5 MB. Maybe someone can share the English versions?