Haiku, Kigo and the English Language

[ellajam]

Hey, folks, I'm looking for some opinions on what is considered Kigo In the English language. Is it a seasonal word that is translated from the Japanese or any word that can be justified as seasonal? Is there a specific list of accepted kigo in Japanese? If so, what impact does it have on English haiku?

I started writing haiku with a reference to nature, not a specific word in mind. I particularly like tanka but I should probably improve my haiku with what I've learned since joining this site before resuming tanka play.

Any and all haiku/kigo views, links, suggested reading would be appreciated.

If my questions are too specific feel free to ramble, any thoughts on the subject are are welcome.