More follow-up: I translated the whole document to “gibberish” (by clicking on the Text button), and that works fine. It takes a long time, though, because each sentence in the document is in a separate, unthreaded text frame, which is not such an efficient way of working, perhaps.
I also selected a bunch of text frames from the first page (probably some 20 frames), and translated all of those (using the option “Translate selected stories only”), and that also worked fine without problems.
Do you know which particular page, or frame, is causing the problem?
