Here's some clues: https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)_per_capita https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)... htt

Here's some clues: https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)_per_capita https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)... https://en.wikipedia.org/wiki/List_of_languages_by_total_number_of_speakers https://en.wikipedia.org/wiki/List_of_languages_by_total_num...