What language do bill boards use?

Sign language.

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How do you know a blonde has been using a dishwasher?

A.It's cloged up with paper plates.

What adjective do you use to describe a bad pun?

Pungent

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What do you call a person who speaks three languages?

Trilingual! Two Languages Bilingual! Only one language Americans

What language do the Vatican Police speak?

Pig Latin!

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What are the unspoken rules of sign language?

All of them

What is the least spoken language in the world?

Sign Language