Translation of coven in Spanish

I would like to give you a proofreader's project. Proof reading sample sentences that were entered into the dictionary by our users. It is a very tough project and needs a lot of discipline and patience.
I met the company last autumn, because the site's traffic is getting pretty big and they invited me to a workshop. They have convinced me that I have to put their logo at the top of the page to maximize exposure and this was a big mistake.
I want learn Spanish because of my girlfriend from Guatemala. She is from Latin America. And of course I want improve my grammar too. I like to hear it, but speaking is still hard. Hasta Luego.