The game has problems saving the game to non-English accounts (usernames with Cyrillic characters). I am not sure if a workaround has been found other than creating a new account without those characters, then playing the game form that account.
For Book II, we have addressed this problem by allowing the player to set the exact directory to be used to save games to. This required a rewrite of the way we initialize the game and so it's not a "quick fix" and won't be patched into Book I at this time. However, we will probably address this problem when we do a complete trilogy release in the future.
Thanks for that! how to hypnotize someone