Will you actually learn the language when your minor is French or some other foreign language?

That's the idea, especially with relatively easy ones.

Learning French is supposed to take "600 hours of class", just like Dutch, Danish, Swedish, Norwegian, Afrikaans, Portuguese, Spanish, Italian, Catalan or Romanian. German takes 750. Esperanto 150.

Languages like Arabic, Korean, Japanese or any variety of Chinese are a different story, "2200 hours of class"

I never really learned a language in college. I studied Russian, French, Arabic, Mandarin, and Japanese in college.  I really did not start learning Mandarin until I worked in China. Than I started learning it much faster. Now I am able to read menus, ask for things, ask women if they like to bake cakes , watch tv or play computer games. Most of the languages  I have learned are from going to nations that speak them. I am able to get through customs at an airport in Cambodia, Brazil, Peru, and China using Portuguese, Spanish, Mandarin, or Khmer. It is fun when I can tell a Portuguese speaker what their Chinese friend is telling them

A French girlfriend will help a lot.

You will learn a little, but you won't be fluent.