I imagine it involves a bunch of moaning ang graoning.
You know what they say, “If you can’t beat them join them. Well first your going to have to learn the language. It’s rather important if you want to blend in with the restless dead instead of becoming one of them.

I hightly suggest buying this book, getting a disguies, and practicing practice practice.

From the Publisher.

The humorous How to Speak Zombie: A Guide for the Living is now out from Chronicle Books (who also distributes Quirk Books, publisher of Pride and Prejudice and Zombies). It’s available for $14.95 and has 24 full color pages and a built-in sound module full of zombie sounds! From Chronicle’s description: In a world overtaken by zombies, the only hope for survival lies in learning the language of the undead. How to Speak Zombie demonstrates how to blend in and avoid being eaten while carrying on with everyday activities like ordering a latte from a zombarista and shopping at a zombie-infested mall.

Buy it here and listen to samples.