Lexicon

Lexicon is the name of WordGirl's home planet.When WordGirl was still a baby, she left Lexicon on a spaceship piloted by Captain Huggy Face. It crashed on earth, and the baby Lexiconian was adopted by Tim and Sally Botsford, who named her Becky. They kept Huggy also and named him Bob.

Not much is currently known about the planet Lexicon.

The word lexicon means a word book or dictionary, which is an appropriate place of origin for someone who has been called "the living dictionary." (The word's second definition--the vocabulary of a particular language, field, et cetera--is also quite fitting.)