Total number of voices covered by the languages of each zone (or of each part of a divided zone) :
This phylosector covers 10 sets of languages (= 150 outer languages, comprising 873 inner languages) spoken traditionally by communities across much of Eurasia, from Iceland and the British Isles in the northwest to Sri Lanka in the south, constituting the Indo-European intercontinental affinity. During the last half millennium, languages of this phylosector (principally from zones 51=, 52=, 53= and 59=) have spread to all other continents of the world, and across northern Asia, and over half the world’s population now speaks a language from this phylosector (as either primary or alternate voices).
Zones 50= to 57= cover languages traditionally spoken in Europe, and 58= to 59= cover languages traditionally spoken in western and southern Asia. Zones are arranged in the approximate geographic order of their traditional areas in Eurasia, moving from northwestern Europe to southern Asia, and this order has no implication for prehistorical reconstructions.