IMHO Nothing worth reading should be read translated, but Stack Exchange is being internationalized (this is not real news). Because I am unable to read and clearly understand the terms of service, I would like to have available a version in Spanish.
As these are legal documents, they exceed my translation skills and probably should be revised by an American bi-lingual lawyer.
I encourage you to extend this to the other internationalized sites. Ultimately, in those sites, there are many users who are not able to read English.