I think our Spanish Program is super unique. I actually hadn't heard about it until I came here, but it's awesome. There is a lot of information that you can read here:
http://www.stritch.luc.edu/medspanish/
Teachers are M1's and M2's who are fluent/near fluent who lead 1 hour classes once a week. Responsibilities include: creating lesson plans each week, giving/receiving feedback from fellow teachers, going to 2-3 lectures on teaching adults, and doing a capstone reflection project. In return, these students receive 2 week's worth of elective credit for the 4th year which is also mentioned in your dean's letter. It also a great way to keep your Spanish up and moving forward.
Student's (not teachers) who attend 90% of weekly classes receive a small weekly financial stipend for attending language school while on the ISI program. The program directors are trying to get more incentives for students that attend class such as transcript credit. Students also, improve their Spanish skills.
Between 2nd and 3rd year, anyone can become a certified bi-lingual medical student with the "Hablo espaNol" tag if they pass a series of tests put on by the hospital and an outside agency allowing that student to translate during clerkships. Participation in the Stritch Medical Program is not necessary to take these certification tests.
Being conservative, I would say 60 students are active in the program either going to a weekly class or leading a class.
There are also opportunities for M1s and M2s to translate/conduct patient interview in Spanish at the Community Health Clinic, the largest free clinic in the state of Illinois who are always looking for volunteers.