I've changed the buy button so that such misunderstandings won't arise again.
As for the translation, it is much better now than it was in the first part of the game Succubus Contract. But I can't guarantee that you will be satisfied and you won't find mistakes at all. What you will notice may not be noticed by others. I recommend you play SC II v.1.1Fix and make your own conclusions. Especially, you can do it for free, as it will soon become available to the public.