Complex sentence: A bilingual pun is a pun in which a word in one language is similar to a word in another language; this is often done by mixing languages, and is a form of macaronic language.
Split into simpler sentences: A bilingual pun is a pun created by a word or phrase in one language sounding similar to a different word or phrase in another language. Bilingual puns are often created by mixing languages, and represent a form of macaronic language.