ironregime said:
I like this idea.
I think you do really need some sort of clever twist or purpose to it--ideally one that the players can eventually discover and turn on its head--or else I think it'll just end up being an annoying and pointless restriction. Like, "Hey, let's all play characters with no limbs!"
OK, I thought about it. Let's try this:
There's got to be a Lovecraftian Bad Guy(s) (LBG) responsible -- maybe some single otherworldly thing, or maybe an otherworldly race. Doesn't matter. What matters is tha the LBG brain is so
alien that its thoughts "leak out" and corrupt the minds of mere mortals so that they speak and write (but not understand) the LBG language. (In this version, it isn't necessary to take away the PCs ability to read normal language, as long as nobody can write in it -- in fact, you may want your PCs to be able to read some ancient tome discussing LBG.) The LBG knows this side effect of its presence leaves mortals unable to organize against it, and counts on the confusion to help it do evil stuff (take over the world, eat people, whatever).
So, if the PCs have the ability to "speak" the LBG language, why don't they make any noise when they try to talk? Because the LBG doesn't have vocal cords -- the LBG is
telepathic. The PCs, being mere mortals, can't use the telepathic language correctly. Except the PCs are heroes, so of course, they'll eventually figure out the secret to beating the LBG isn't to
resist the brain-warping thoughts -- they have to
embrace them. For the big climax, the PCs have to risk soul and sanity in order to become (temporarily) telepathic themselves, which lets them take on the LBG in a fair fight. (For the ultimate
Twilight Zone/Buffy twist, just being able to transmit non-LBG thoughts could be a weapon against the LBG.)
Too much?