i've been playing for about 15 minutes as Fanny and i get frequent audio overlaps with character dialogue.  I'll interact with an object as Fanny, and often get the tux dialogue overlapping a few seconds off synch and not translated. Tux is not on the screen with me.

Is this normal?

Interesting, no, that doesn't sound normal at all. What platform are you running the game on - and is this the demo or full version? If you're able to record any video of the issue that might be helpful too, since I don't think we've ever encountered anything like this before.