Change default messages from Poll? We're running the core Poll module on our site, and we'd like to change the default messages that it generates. I'm meaning stuff like Your vote could not be recorded because you did not select any of the choices.

I looked at the poll content type, but there weren't any settings for it there. It's apparently not listed under modules, because it's core, I suppose. 

How can I change these messages from their defaults?
You can use the String Overrides module.  More options are described in the handbook page Change default strings (text).