Answer:
A spirited jig I dance bright, banishing all but darkest night. Air can't kill me but water can. Share me, I won't get less unless wind ruins me. What am I?
The more you have me, the less you see. Shine a light on me and I flee. What am I?
What gets whiter the dirtier it gets?
My first half means container. Not a lot of people understand my language. What am I?
The more you add the less it weighs. What is it?
What language does a billboard speak?