(8). Do you use alignment languages?
Sure, why not? But for all the fuss that people make about alignment languages, I'd really like to know how often the topic even comes up. I think that, back when we played AD&D by the book (for the sections of the book we used,) someone tried to use an alignment language once or twice. And that's AD&D, with its greater variety of alignments.
I wonder how many people who object to alignment languages or even to the Common Tongue also object to the occasional speaking animal. Myth, legend, and literature has talking animals of various kinds, either as a freak of nature, a small group of freaks, or the normal course of events. Heroes can understand the language of birds or snakes or trees, in some stories. If you can accept a talking cat, why can't you accept a goblin who speaks the language of Chaos? It's actually a little more believable than talking cats, isn't it?
The existence of alignment language just indicates that the default setting of D&D exists on the edge of fairy tales.