Using Foreign Words in Foreign Settings

On the post 5 Tips for Using a Foreign Language, Linda asked a very good question: "[What] if the characters are only speaking/thinking one language which is not English but the narrative is in English[:] which words should be in English and which, if any, should be 'foreign'?"



One of my very first writing tutors was Orson Scott Card's How to Write Science Fiction and Fantasy, and I'm pulling straight from that. If you're a world-builder of any sort, I highly recommend finding a copy of this...