Well there’s one way to find out.
Every university lists their requirements for admission to their school. Look at their websites and do a little research see if that corresponds to the number of years that you’ve taken your foreign language.
The top universities will list the minimum requirements for foreign language coursework; but when they say “four years recommended”, they mean: if you want to get into our school, you’re going to take four years. Foreign language is a core requirement. Most of the really good schools want to see rigor. If you take two years, and four years of studies are available, you’re not demonstrating rigor and they will wonder why you opted to chose a non core elective over a core requirement.
Is there another time that you can take the class that you’re really interested in? You can find out by taking the class of interest and then submitting your applications. They will let you know, whether or not, you’re accepted or rejected.
I agree with the previous poster that a number of universities have foreign language requirements. So, if you didn’t meet the high school foreign language requirement, you’re going to have to complete it at the university level.
From my experience, these classes were a lot tougher at the university level. I took 4 years of French in high school. I had a big gap between morning and afternoon university classes, so I decided to take an introductory conversational class in French. I was blown away by what they called introductory French! Fortunately, I’m fluent in Spanish, so I could fill in the gaps with the Latin-rooted terms and phrases, but it was a tough course.