And there you have it. The centrifugal force of nationalism (in the separatist sense) against the centripital force of desire for a common language. It's all tradeoffs. And you have to judge each case on its merits. You can't say all small-language movements are a bad idea, or that they're all good. But, all things being equal, I'd advocate that a 'new' country like Kameroon push for general knowledge of a major language, useful outside the country, rather than elevating one of its native languages at the expense of such knowledge. It all depends on whether the government wants its citizens to have more opportunities, or prefers that they be that much more insulated from outside influences. Jacques mentioned Mexico. Imagine how bollixed-up Mexico would be today if it had decided to reject the evil European language, Spanish, in favor of Nahuatl and the dozens of other languages originally spoken there. And one more thought: Preserving a small language can indeed help to preserve small cultures — but are all small cultures worth preserving? Another thing that has to be decided on a case by case basis.