Quote Originally Posted by Duke of Urrel View Post
Suppose we make a house rule that says that Druidic can only be spoken by druids. Under this rule, the ability to speak Druidic is really more of an exclusive class feature than it is merely the ability to speak a language. It resembles the Hive Mind of formians, which is powered by the telepathy of their queen. Unless you are a formian, you can't benefit from the Hive Mind at all.
For all the reasons you give, I conclude that answering the question, or even asking it, adds complications and annoyances, and adds nothing to the game.

I don't want a house rule that says only druids can speak it. I want a general player agreement that we don't bother to mess with it.