Your estimated SAT is above average for most of the schools mentioned in this thread.
You will not need to pursue a minor in a language for your expressed goals. The availability of a minor in a field such as linguitics can be used to as an indicator of the breadth of courses available, however.
There is no firm definition – other than the obvious literal one – for what “fifth-semester” language instruction entails. Commonly, though, the fourth and fifth semesters of college language are taught in the corresponding language. Reaching this level of classroom proficiency will fully prepare a student for an immersion experience.