I was an intern with an industrial cleaning company in Paris. It was extremely useful because it gave me an opportunity to see how a French company ran. I translated brochures for them into French. Resist learning something just because it looks good on your resume. It might be a rocky road to do what you love, but you'll eventually find your way.
Internships are critical for employment.
They give you a chance to find out what you want to do. They are an avenue in if it is what you want to do. And, they can develop your skills. If you want to be bilingual and are interested in business, complement your French major with economics, math, etc. Study abroad is essential.