The first I thought of was your second point. Of course, this is dependant on translation algorithms that are at least somewhat inaccurate. You may want to ch

The first I thought of was your second point. Of course, this is dependant on translation algorithms that are at least somewhat inaccurate. You may want to choose one closeby language, and one further removed and find the equilibrium phrase. For example, translate english->german->italian->german->english, repeat until you get the same english phrase each time.