As DF points out there’s some unease about Apple’s use of the word “funnest,” which, as it turns out, is a real word.  Regardless of being a “dictionary word” and thus being somehow more legitimate, no one seems to remember that intentional misuses and grammatical improvisation are fun.  Does anybody out there remember fun?  We invented it in the ’70s.

Whether it’s “in the dictionary” or not is meaningless.  It sounds off.  It’s clearly supposed to. That’s the fun part.