“Index value is the probability of two people selected at random from any one country speaking the same language. 1.0 is most diverse, 0.0 is least diverse.”
I leave the reader to judge for themselves whether that is a good measure to judge diversity as being discussed here or not.
Is it. I was curious, and the first google hit I came across was:
https://worldpopulationreview.com/country-rankings/most-dive...
Not sure what this measure of diversity is, clearly the US is not the top of this list...For example, in terms of language, Nigeria has 525 languages:
https://en.wikipedia.org/wiki/Languages_of_Nigeria