[arbitrage]

t;dr: it's Japanese

[0cf8612b2e1e]

That really was not the takeaway.

  …The paper found that, in terms of sheer number of syllables spoken per second, the fastest languages of the 17 studied were Japanese, Spanish, and Basque. The slowest were Cantonese, Vietnamese, and Thai.
  …
  What Pellegrino found is that, essentially, all languages convey information at roughly the same speed when all the factors are taken into account: around 39 bits per second. The higher the syllable-per-second rate, the lower the information density, which creates a trade-off that makes all languages around the same in terms of information rate.

So if you wanted to communicate the most quickly, you should rapidly speak in a more dense language like Cantonese or Vietnamese.