I’m not really fond of Opera’s translation menu; maybe it’s because it only offers a handful of languages (and I have some Finnish, Danish, Swedish and other -ishes friends on Facebook).
Hopefully Opera’s known power user, Tamil, had a solution for a similar task, which I changed a bit:

Go to Tools -> Preferences -> Advanced -> [...]

A group of journalists, bloggers, professionals and creators want to express their firm opposition to the inclusion in a Draft Law of some changes to Spanish laws restricting the freedoms of expression, information and access to culture on the Internet.
Read the declaration here.