How much of an impact will this have in getting into top schools? Is it very prestigious or not very significant?
I think it’s a great EC and if you have an interest in language, especially so. It’s a tough program to get into and colleges recognize that.
It’s very prestigious, especially if at the end you scored well on the proficiency grid. It’s also a definite advantage at Critical Language Flagships and if you’re applying for a “cohort” related to your language for International Business at USC Columbia.
BTW look at a thread titled something like “should quadruplets apply to the same universities?”