So, some answers. I've had two paid published stories in SFF and am working on getting novels published.
1/ If your first novel is interesting but riddled with spelling/grammar/syntax errors publishers won't buy it since readers won't read it.
2/ The cost of editing has shifted from the publisher to the author since when Stephen King started out. I know several professional editors working in SFF. You should also consider using non-professional editors (AKA Betas). The reality is that it does not matter how good a writer you are or how much experience you have; the book inside your head is richer and more fleshed out than the book someone else is reading.
3/ I live in Canada and have some knowledge about the publishers here. When you sell a book you are also selling specific rights. It's rare that you can sell a book to more than one publisher - even if they are in separate countries or separate languages. The exceptions I've seen: getting permission to sell in a tiny minority language (Aboriginal authors who have a major publisher for English but do a run in their own language) or the case when a publisher reverts the rights to the author after a period of time.
Since you say the original novel isn't in English, I recommend you check with a writer's association in that language for more relevant information on publishing standards.
