The colors represented the four countries of Oz, and the green star the Emerald City.
Tiny countries willing to engage in free trade with their neighbors can prosper.
As nice as it would be for the Japan strategy to work in the developing world, I don't think these countries can count on it.
It is already the official language in more than fifty countries spread across every continent.
It had to be replaced by new concordats concluded with Wurttemberg in 1857 and the grand-duchy of Baden in 1859; but these conventions, not having been ratified by those countries, never came into force.