The list of words that a speaker of a language knows is called his or her?

I dont think there are any words that you could put know in, but you could add a few letters to the beginning and end of the word. For example, you could put an -ing at the end to make it knowing.

screamingpickle.com/humor/legends/gangsta/gangsta_shih.htm that site tells ya some words. otherwise just type in google: gangsta language :)

hds

Polyglot- One who knows many languages. These other definitions come from Wikipedia under the term Polyglot: Multilingualism, a single speaker who uses two or more languages, or a community of...

Bilingual