I know a lot of Wiccans and the so called incantations don't sound like any I've come across anywhere but in fiction.
Slight highjack:
The Wiccans you know probably know little of the history of Wicca (similar to many Christians and others who know little about the history of their own respective faith). It is a reconstruction religion that is based on the ideals of original druidism and other nature worship religions of the Celtic people, but has no direct ties to those people and definitely not witches. Read the Wiki article on the origins of Wicca and some of the questions of its origins. Also, you can see here where Silver RavenWolf (a practicing Wiccan) states that Wicca of today doesn't even represent the practices of 30 years ago, let alone 1,000 years ago. So, it is of no suprise to me that the "spells" don't sound like anything except something out of fiction. :^)