Chances of admission to top 50 university with excellent grades but few extracurriculars [WI resident, 4.0 GPA, 1520 SAT, 34 ACT, <$40k; social sciences]

[Pier]

I would make sure you can document your fluency in the languages other than home languages with the DALF, the DELE, and the Test DaF. This will make your application stronger.