No, there is actually a fascial connection that runs all the way from the tongue to the big toe I think. The idea is that tension or misconfiguration at one end of this connection could affect the other end. So in this case, maybe modern narrow footwear that causes the big toe to point inward has an effect on the tongue.

If you've ever tried walking long distances with even a slightly ill-fitting shoe, or carrying something of an awkward shape, you'll know the kind of thing I'm talking about - in order to function under load for long periods without incurring damage, everything kind of has to be coordinating perfectly. Maybe over months to years, especially in early development, confining the feet to an unnaturally-shaped space could have a measurable effect on oral posture.