Languages have deep political significance beyond communication: a common language can strengthen cultural bonds and social trust, or it may exacerbate cultural differences and power imbalances. Language regimes that emerge from political bargains can centralize power by favoring the language of one ethnolinguistic group, share power by recognizing multiple mother tongues, or neutralize power through the use of a lingua franca. Cultural egoism, communicative efficiency, or collective equality determines the choice. As Amy H. Liu demonstrates, the conditions surrounding the choice of a...