English is part a)Celtic by way of the natives of the British Isles (at the time of the Romans), b)Latin by way of the Romans, c)Germanic by way of the Angles, d)Germanic by way of the Saxons, e)Germanic-Scandanavian by way of the Norse, f)Germanic-Frankish-Latin-French-Norse by way of the Normans, e)with adoptions by other sources as well.
English will be the world language, as it has already proven itself the most adaptable langauge - it readily absorbs words from everywhere while maintaining an “English” core.