A scanlator is a person who performs scanlations, which are the unauthorized scanning + translation of a source work, usually a Japanese manga of some sort, into English for dissemination by e-mail or blog.
For more information, see scanlation.
"Who's the translator on this graphic novel? Or should I say 'scanlator'."
"Scanlator is the word, the person is called "Kuzzy" but there's no full name, e-mail or blog address. They prefer to keep it that way because what they're doing breaks international copyright laws, even in cases of works that have been sitting untranslated into English for years."