What do you think Foucault's Pendulum is detecting? It's just a mechanical integrator of change in linear motion.
So either God is manipulating every Foucault Pendulum and accelerometer in the world individually, or there is one simple motion that explains the response of every one of these devices. I vote for the simpler answer. God has better things to do than mess with our heads.
The above comment is of course how you discribe the pendulums motion using the earth as a reference. Using the sun as a reference no forces have to act on the pendulum as the earth rotates around it.