Maybe take a look at Middlebury. It’s probably a little farther than is ideal, but it is a liberal arts school with a strong language program. Unfortunately, many smaller schools have cut back on their French programs. Back when dinosaurs walked the earth I was a French major (doubled with History) - if your son is already fluent, what is he hoping to focus on - literature, history or something else? Career goals? I had originally thought of going into the foreign service but ended up in market research where I didn’t use my major (although I don’t regret it just wanted to point that out). You might explore schools in French speaking Canada or think about having him study in France if that would be of interest.
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