When plantation workers came to Hawaii from Asia, Europe, and South America in the 19th Century, they needed a common language to share with the locals. By the 1920's, Hawaiiwan Pidgin was so widely spoken that textbooks began to be written in it. Want to hear Shakespeare's "Twelfth Night" in pidgin? You're in luck.
The language has loan words from Japanese, Portuguese, Cantonese, Mexican Spanish, and Korean. It has its own grammar. Talk about a young, multicultural tongue.