Having read this and the example audio it appears that the researchers seem to believe that external 2nd language speakers will dictate what English sounds like

Having read this and the example audio it appears that the researchers seem to believe that external 2nd language speakers will dictate what English sounds like in the future and when I heard the 100 years in the future example I was having deja vu with what many non-Native english speakers would speak today. So I'm inclined to dismiss this unless everybody in the country suddenly has a stroke, which again, most unlikely and if you go 100 years in the past, you would find it less disparity than this speculation. What does happen is new words come into play and more so over perversion and bastardisation of existing words. But we have many flavours of English and with that, you can not these days define English as one language and country variations are abound from the America's to Jamaica in which the localisation is most noticeable. As you equally get with geographic variations within the UK and are accent inflections. But listen to the example of how they perceive English in 100 years time and then somebody who is recovering from a stroke. That too me is just wrong.