Do you use MS Word 2007? If you're not looking for a professional translation, copy and paste the content or type individual words (links etc) into Word, highlight the text to translate, click Review, Translate and choose your language. As long as you use good English grammar and correct spellings, you can get a pretty reasonable translation. Just copy and paste it into your new website pages.
If you don't use Word 2007, you can also try Yahoo's Babel Fish.
However, if it's a professional translation you need, I would choose a professional translation service. You'll see some online ones listed under Word's translation. Or check out your local Chamber, Business or phone directories for translation companies.
You can also try...
Try also searching for Applied Language - Web site Translation tool 1.0.1... you can download the software from http://www.CNET.com.
Even if you don't use a professional translation service to translate the text, I would recommend using them to review it and correct anything that doesn't make sense.