The reader makes a good point, but I think there’s a way around the problem.

Charles Murray has suggested that schools not accept tests for languages spoken in students’ homes. I’d go a step farther, considering how easy it is to cheat on that–foreign languages cannot be used as one of the core tests, period. They can be a bonus, but there’s just no way to base a significant chunk of admissions on a test that does not measure all students in the same way.