1. English written test, not less than 50 questions at first year college level.. or at the level of schooling their age requires ..high school level for high school age kids .. etc)
2. English oral test, including spelling, also at first year college level.
..a distant 3rd would be a smattering of History, overview of USA Govt heirarchy and how the branches 'work' (and I use the term loosely)
..and some basic knowledge of how the police work and when/why to call 911 and what to expect when you do.
If I moved to Mexico .. I would learn Mexican.
Not gonna learn it to live in the USA.. and those who come here and dont learn to speak English will always be second class citizens IMHO.
-Frank (and yes .. when our family lived in Weisbaden, I learned duetsch, way back when I was a kid )