If it’s Community College French 1+2, you’re in luck, it’ll be considered equivalent to HS levels 1, 2, and 3! He should be ready for a HUGE amount of work, to be done quickly. 1 day would be equivalent to 1 week if not 2 weeks of HS French because regular-semester college French covers 2 years of HS French in 4 months, and summer classes compress that further!
Keep in mind that even Engineering students at Notre Dame have to take a set of core requirements that go beyond what a technical school would expect, with Philosophy and Theology required in addition to the ABT-accredited usuals of Literature, Social Science, History.