Brian Krebs, "Lorem Ipsum: Of Good & Evil, Google & China", Krebs on Security8/14/2014:

Imagine discovering a secret language spoken only online by a knowledgeable and learned few. Over a period of weeks, as you begin to tease out the meaning of this curious tongue and ponder its purpose, the language appears to shift in subtle but fantastic ways, remaking itself daily before your eyes. And just when you are poised to share your findings with the rest of the world, the entire thing vanishes.

 It all started a few months back when I received a note from Lance James, head of cyber intelligence at Deloitte. James pinged me to share something discovered by FireEye researcher Michael Shoukry and another researcher who wished to be identified only as “Kraeh3n.” They noticed a bizarre pattern in Google Translate: When one typed “lorem ipsum” into Google Translate, the default results (with the system auto-detecting Latin as the language) returned a single word: “China.”

Capitalizing the first letter of each word changed the output to “NATO” — the acronym for the North Atlantic Treaty Organization. Reversing the words in both lower- and uppercase produced “The Internet” and “The Company” (the “Company” with a capital “C” has long been a code word for the U.S. Central Intelligence Agency). Repeating and rearranging the word pair with a mix of capitalization generated even stranger results. For example, “lorem ipsum ipsum ipsum Lorem” generated the phrase “China is very very sexy.”

Variations on the "Lorem ipsum" text produced even more bizarre results.

Krebs reports a wild and wonderful theory about all this:

Kraeh3n said she’s convinced that the lorem ipsum phenomenon is not an accident or chance occurrence.

“Translate [is] designed to be able to evolve and to learn from crowd-sourced input to reflect adaptations in language use over time,” Kraeh3n said. “Someone out there learned to game that ability and use an obscure piece of text no one in their right mind would ever type in to create totally random alternate meanings that could, potentially, be used to transmit messages covertly.”

Meanwhile, Shoukry says he plans to continue his testing for new language patterns that may be hidden in Google Translate.

“The cleverness of hiding something in plain sight has been around for many years,” he said. “However, this is exceptionally brilliant because these templates are so widely used that people are desensitized to them, and because this text is so widely distributed that no one bothers to question why, how and where it might have come from.”

Google's explanation makes more sense to me, though it's not nearly as much fun:

Just before midnight, Aug. 16, Google Translate abruptly stopped translating the word “lorem” into anything but “lorem” from Latin to English. [...] A spokesman for Google said the change was made to fix a bug with the Translate algorithm (aligning ‘lorem ipsum’ Latin boilerplate with unrelated English text) rather than a security vulnerability.

The comments on Brian's post include some other amusing examples, like the fact that not all fragments of the Lorem ipsum passage have been fixed – here's my own screenshot from this morning:

… and the fact that even the original fragments still work going from English to Latin(again a screenshot from a few minutes ago):

As other commenters explain, it's pretty obvious why a statistical MT algorithm would do this kind of thing, given what an unsuspecting automated finder of apparently parallel text is likely to come up with in the way of Latin/English training material. At some point, Google will manage the harder job of purging all instances of Lorem ipsum text from its training data, and then this particular source of amusement will mostly be gone.

For those few who may not know what Lorem ipsum is, Wikipedia explains that

In publishing and graphic design, lorem ipsum is a filler text commonly used to demonstrate the graphic elements of a document or visual presentation. Replacing meaningful content that could be distracting with placeholder text may allow viewers to focus on graphic aspects such as font, typography, and page layout.

The lorem ipsum text is typically a scrambled section of De finibus bonorum et malorum, a 1st-century BC Latin text by Cicero, with words altered, added, and removed such that it is nonsensical, improper Latin.

A variation of the ordinary lorem ipsum text has been used in typesetting since the 1960s or earlier, when it was popularized by advertisements for Letraset transfer sheets. It was introduced to the Information Age in the mid-1980s by Aldus Corporation, which employed it in graphics and word processing templates for its desktop publishing program, PageMaker, for the Apple Macintosh.

The typical Lorem ipsum passage is a munged derivative of a part of I.10.32 of Cicero's work, starting with the last five letters of the accusative form dolorem, and picking up and adding letters (as indicated below until I lost interest):

Sed ut perspiciatis, unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam eaque ipsa, quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt, explicabo. nemo enim ipsam voluptatem, quia voluptas sit, aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos, qui ratione voluptatem sequi nesciunt, neque porro quisquam est, qui dolorem ipsum, quia dolor sit,ametconsectetur, adipisci[ng] velitsed qu[d]ia[m] non num[my]quameius modtempora inciduntut labore et dolore magnaaliquam quaeratvoluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam  corporis suscipit120 laboriosam, nisi ut aliquid ex ea commodi consequatur? quis autem vel eum iure reprehenderit, qui in ea voluptate velit esse, quam nihil molestiae consequatur, vel illum, qui dolorem eum fugiat, quo voluptas nulla pariatur?  At vero eos et accusamus et iusto odio dignissimos ducimus, qui blanditiis praesentium voluptatum deleniti121 atque corrupti, quos dolores et quas molestias excepturi sint, obcaecati cupiditate non provident, similique sunt in culpa, qui officia deserunt mollitia animi, id est laborum et dolorum fuga. et harum quidem rerum facilis est et expedita distinctio. nam libero tempore, cum soluta nobis est eligendi optio, cumque nihil impedit, quo minus id, quod maxime placeat, facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.

I have no idea why they didn't just use an unmunged chunk of Cicero — but no doubt one of our erudite commentators can enlighten us.