Actually, that was intentional just to be funny. There are indeed many words which can sometimes be names (some months, some town names, I even know a woman who's birth name was America).

I let the user control which names are translated (and they select a name for each unique identified name) and allows the user to mark a suspected name as not a name. This is the `--interactive-naming` flag.

I added that after the first iteration and reading through an ePub on my Kobo and found tons of random proper nouns "flipped".