@Gabriell, To change the language of the game, in the cfg folder there's a text file called "language". Modify it by just putting the language code (probably an ISO 639/1 language code) into the file, in this case "en" for english, "es" for spanish, you know it.
@Ilia, I think that they're translated into russian, however since the crazy mod's development has gone into dormant mode I unfortunately don't have information nor update about the translation. Sorry, I'm not a native italian nor russian speaker/writer.