Export a book in one language only as text file to used in sample texts

It would be really nice to be able to save a book as a text file, for use in sample texts for the decodable books. Currently, when I want to do this, I have to export first to word, then save as a text file with the appropriate encoding. The problem arises in that I then have to edit out any other languages that come along, if it was translated from a shell book. It’s do-able and worthwhile, but I’d love to have it just be a little easier.