A friend of mine who is involved in translating the Bible into the language of a small people group, was discussing with me just how to translate the word "week" from Daniel 9:24 >>.
Among the people with whom he was working, week typically means 8 days. So far my friend's best efforts at translating in a fairly literal way was resulting in a paragraph to translate a single word. The smoothest solution--one he isn't entirely comfortable with is--is to give the number of years involved (See Daniel 9:2). Part of the problem stems from the fact that some of the people are bilingual and sometimes read the Bible in another language.
My friend will work it out.
Here is a much more troubling translation issue. http://www.christianitytoday.com/ct/2011/february/soncrescent.html?start=1
If nothing else, reading the article will encourage prayer for missionaries to the Muslim world.