I'm asking for a long book like War and Peace (does anyone have a better idea ?) to have a sample of significant size. "I can eat glass..." is such a tiny sample.
I forgot about ideograms and Japanese. To level the playing field, we would have to compare with Japanese written using roman alphabet.
http://en.wikipedia.org/wiki/Romanization_of_Japanese
Romanized Japanese is not perfect, but I'm not looking for a perfect solution.