Interesting. I was looking at: http://upload.wikimedia.org/wikipedia/commons/4/4f/IndoEuropeanTree.svg http://upload.wikimedia.org/wikipedia/commons/4/4f/IndoE

Interesting. I was looking at: http://upload.wikimedia.org/wikipedia/commons/4/4f/IndoEuropeanTree.svg http://upload.wikimedia.org/wikipedia/commons/4/4f/IndoEurop... There are subdivisions like Germanic and Romance in the language family which do seem sufficiently far apart. However, there are quite a few subdivisions that seem very closely related. I wonder if there is a way to draw entirely new subdivisions based on benefits of knowing languages from each subdivision. Also, intuitively, what you say about knowing unrelated languages makes sense. I am curious however, if you had some deeper insight or knowledge into why (if true) this might be?