Lol, 30 is way too soon. Try 150. Read history. The world you are imagining could just as easily be one where Chinese and Arabs dominate, the US and UK are a j

Lol, 30 is way too soon. Try 150. Read history. The world you are imagining could just as easily be one where Chinese and Arabs dominate, the US and UK are a joke, and yet the dominant coalition paradoxically speaks English at least for elite communication anyway. Did you know the original Latin language came from a tribe called the Latins that were vanquished by the Romans? Reading the history of English after the Norman Conquest might be instructive too. For centuries the common people spoke the language that had been spoken locally, while the elites spoke the language of the old conquerers. Fundamentally, you underestimate the chicken and egg effects involved, and they happen on a time scale of generations because that's the time scale upon which people learn languages.