If you are aiming at the most selective colleges that recommend or require level 4 foreign language, you would be at a disadvantage in admission if you only have level 3. In addition, many colleges have foreign language graduation requirements, so completing a higher level in high school can help you complete such a requirement with fewer courses needed in college.
AP statistics emulates a non-calculus-based one semester introductory statistics course; in both colleges and high schools, such statistics courses are often taken by students who need to fulfill a quantitative or math requirement but do not want to take calculus. Students whose majors require or recommend statistics (e.g. statistics, some engineering majors, economics, business, biology, etc.) may be required to take a calculus-based statistics course instead, or may find that a calculus-based statistics course is more useful.