I was only expecting English voices. Subtitles would be in all languages of course.
Also to the people mentioning production time. Setting up two audio files to play according to the options menu would be extremely easy. Yes, gathering and recording all the voices would be a big undertaking but even in saying that, I don't expect this game to have mountains of dialogue. And the main team wouldn't be working on this task, supervising it sure, but I'm sure it would be outsourced to someone else who they will pay with additional stretch goal funds.