I have said before that I have nothing against the use of many languages as working languages in the country, simply because it reflects the true picture of our country Ethiopia. But at the same time we shouldn't shy away to point out that the more languages are added to the set, the more it gets impractical (and with that more unproductive), I am afraid.
Listenting to the following video it seems that my fear is not that far fetched. We are a mosaic, so is the world also. But still this fact didn't hinder the world to try to limit the number of languages for official duties and communications among the members of the united nations to just 3 or so. If they had adopted more of the languages, then it simply costs them efficiency, in my view.
So, adopting more than 3 languages could cost the country on the productivity front, I am afraid.