The Power Language Index: Why English Scores Double Mandarin
Over 6,000 languages are spoken today, yet 15 of them carry half the world’s conversation. Kai Chan’s Power Language Index, built at INSEAD and featured by the World Economic Forum, ranks 124 of them by the doors each one opens. Its core claim still holds: English is not first among equals, it laps the field.
The method is the point. Chan scores each language on 20 indicators across five opportunities: geography, economy, communication, knowledge and media, each weighted 22.5%, plus diplomacy at 10%. Native speakers are one indicator out of 20. Mandarin has 960 million natives against English at 446 million, yet Mandarin scores 0.411 to English at 0.889. Headcounts lose to infrastructure.
Walk the gap slowly, because it is the whole story. English at 0.889 is more than double Mandarin at 0.411, and it ranks first in all five pillars at once: most countries, biggest GDP bloc, 510 million second-language speakers, 55.5% of internet content, and top standing in every diplomatic institution measured. No other language leads even two pillars outright. That is what a lingua franca looks like in numbers.
French at third is the delightful puzzle. Only 80 million natives, a fifth of English, yet it scores 0.337 and edges Spanish at 0.329. The answer is institutions. French shares the top diplomacy rank with English, official or working language across the IMF, UN, World Bank and the supranational index, and it ranks second in geography, spoken across three continents. Empire ended, paperwork stayed.
The footnotes deserve honest attention, because small grouping choices move ranks. Chan notes that folding all Chinese dialects into one changes nothing, while merging Hindi with Urdu and its dialects would vault it past Portuguese and Japanese into eighth. Arabic at fifth carries its own warning light: fourth in geography and diplomacy, eighteenth in knowledge and media. A single score always hides which doors are actually open.
Chan ran the table forward to 2050, and the forecast is consolidation, not upset. English stays first at 0.877, Mandarin climbs to 0.515 but never closes, Spanish passes French for third, Hindi rises as Japanese slides to tenth. Demography moves slowly and institutions move slower. The hierarchy hardens.
You might think a 2016 index is dead in the age of earbuds that translate. Chan answered this inside the report, under the heading “Sorry, Google translate will only get you so far.” Language carries culture and emotion that devices do not, multilinguals decide with measurably less bias, and personality itself shifts with the tongue you use. The AI era has confirmed him sideways: machine translation killed phrasebooks while LLM training data and tech hubs entrenched English further. Friction fell, hierarchy stayed.
My caveat is the report’s own: it measures usefulness to a representative human, not beauty, merit, or which language you should learn. Nobody should pick a tongue off a leaderboard. Chan’s throwaway suggestion is better, that competitive polyglots can sum the PLI scores of everything they speak. English first for global doors, then whatever your geography and wallet point at.
The takeaway: Before your next language commitment, read the top-10 table and the 2050 forecast, then pick the second language your own life runs through. The index tells you why English pays rent. Only your map tells you what comes next.
Related TMFNK Content
- Learning English 坦然面对学习中的“不适感 The practical companion that already uses the PLI as its why, then supplies the how through daily immersion.
- Politics and the English Language by George Orwell Orwell on what dominance does to a language from the inside, six rules against its rot.
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