I agree -- in part. But the evolution of our species has always been in sync with technology, ever since we first began developing primitive tools to make catching food easier. When the technology developed to the point of no longer having to catch food ourselves, we inevitably lost certain skills. There was no longer any... impetus to learn the patterns of behavior in every variety of potential prey. A part of our brain no less important than the part devoted to learning language was discarded. I believe most theories of human evolution suggest that the time we used to spend hunting and foraging was then freed up for other pursuits, leading eventually to the intellectualism prized in modern times. [ in other words, the higher people got in technology, the more thinking they were allowed to do ]
[ a pause ] I think it may be a mistake to assume that the part of our brain you're concerned with won't instead be similarly freed up for some other, equally important pursuit we simply can't imagine at present. But either way, I regret to inform you that diminishing linguistic ability is not directly tied to technology. My world has only one real language, and I believe that is a likely end result for your "Earth" as well, as globalization continues. Don't many of the people in your world already speak English?