The original document is in English. Or at least that's the language that it renders in when it has been dl'ed or when it displays in another browser.
I looked at 2 documents yesterday, one I screencaped above, the other was a random selection. Both gave me scramble text.
Here's a link to the one I screencapped
http://www.scribd.com/doc/81979718/Drif ... ow-Excerpt
Yet, I viewed another random selection from the scridb homepage today, after reading your reply, and it rendered properly O_o
Is it a maybe a matter of Direct linking to a document, vs the linking in from the homepage? That is the only difference I have done to get a page to render properly with the scribd reader thingy that is used.