Language requirements for the RC - is the proficiency test required?

If you chose a language not offered by the RC, would you have to take a proficiency exam? Thanks.

My D was in the RC, taking Spanish. The RC website states:
If a student isn’t interested in studying one of the six RC languages but wants to be in the RC, he or she may, of course, take the equivalent of an RC language requirement in his or her desired language—4 semesters and a readings course. Proficiency exams are not required for languages not offered in the RC.

https://lsa.umich.edu/rc/current-students/curriculum/languages/languages-proficiency-faq.html