Bausch,
There are a few issues here. First, I can't find a simple way to get text from a PDF with Automator. There are some scripts that could be used to do this, I'm sure. But if it's just one PDF you want to translate, double click on the PDF to open it in Preview, Apple-A to select all text, Apple-C to copy it. Open a new TexteditDoc, Apple-V to paste. Save the document.
Apple has created a translator action, but I've had no luck in getting it to work:
http://www.automatorworld.com/archives/translate-text/
Download it and import the action into Automator. Your workflow would be:
Get Selected Finder Items (Choose the TextEdit Doc with the pasted text in it.)
Open Selected Finder Items
Get Contents of TextEdit Document
Translate Text (This will be in the TextEdit Library. Set to French>English or )
New TextEdit Document
No guarantees this will work, but it's worth a try. It it were, you could set another translate action to English>Spanish, but I think a lot would be lost in translation.
Kevin