At the very end of the song, it sounds as if there is a choir singing a bizarre, foreign language in almost a "jazz-scat meets gospel" style. Prince used a technique called backmasking to record this section. Played forwards, it just sounds merely like a strange gospel chorale. Played backwards, the choir is singing, "Hello! How are you? I'm fine, 'Cuz I know that the lord is coming soon... Coming, coming soon!"
It is a very clear example of intentional backmasking. You can verify this using a computer containing software that can reverse digital files. Prince also used backmasking on many songs on the Purple Rain
album, and subsequent albums to follow.
Dave - Marieta, GA