Found this:
Any object moving in a circle or along a curve is changing velocity (accelerating) even if its speed is constant, because its direction is changing. ... An object moving in a circular path at constant speed is a simple example of acceleration at constant speed because its velocity is changing direction.
To obtain a Class E license, you must:
Be at least 16 years old
Complete a TLSAE course
Provide proper identification
Pass the vision exam, Class E knowledge exam, and driving skills test
There are others, but these were the ones off the top of my head that mattered. From this we can conclude that you do not have to be a U.S. citizen to obtain your Class E license.