I have a client with a book in which characters speak in multiple languages. She wants the text in English with alternate text available in Latin and French. She want this to be dynamic—so that readers can tap the text/paragraphs and get a translation. I don’t know that this is possible in an ebook? Particularly since the most important (largest) audience will be buying from the Kindle store in that format.
My thought was to do it as footnotes which I think do work on most devices. Is there any other way?