I have no stats regarding "purchasing power" but looking at List of languages by number of native speakers[1], the obvious candidates would be French, Portugues

I have no stats regarding "purchasing power" but looking at List of languages by number of native speakers[1], the obvious candidates would be French, Portuguese and Arabic [1] http://en.wikipedia.org/wiki/List_of_languages_by_number_of_native_speakers http://en.wikipedia.org/wiki/List_of_languages_by_number_of_...