People have lobbied their boards trying to get Klingon on their peace poles. Imagine what that would do on a university campus to keep their peace pole present in the minds of their community. Every freshman would have to take a look at that.
Here is my current translation of the phrase into Klingon:
jaj roj ché Dat
That translates as "May peace reign everywhere" since Klingon would be concerned about regions beyond the earth. But it is a machine translation done by looking up one word at a time. Some Klingon expert likely would have better thoughts. If you know of a Klingon expert, let me know.
Other translations have been proposed, like "chaq tera' chargh roj" which means "May peace conquer Earth" and "tera'Daq taHjaj roj" which means "May peace continue/go on/endure on Earth."
I would be interested in more thoughts on the subject. Even flippant ones, 'cause you never know.
War is in headlines. Read the footnotes.